I understand it fine.
There are clearly flaws in these metrics when, using Newcastle and us as the examples, they routinely suggest that one is outperforming the other, when the reality has been the exact opposite.
I understand your points about Newcastle's best performances being better than our best performances, them being better than us in the most recent head-to-heads, and even their performances against the "big" sides (although they've been beaten by Liverpool and City twice, and 4-1 by both Spurs and Arsenal this season), but the reality is that we won more games than them last season, and have won more games than them this season, even if the xPts, xG and xGA stats say things should have been different.
I get that consistently good performances are more likely to lead to consistently good results (and we're definitely not putting in consistently good performances), but these metrics are quite clearly not measuring good performances as they are regularly completely unrepresentative of the actual results (or indeed performances).
To give you some other examples, by xPts:
- This season, Brentford (who are 16th) should be ahead of us, and Bournemouth (who are 15th) just behind.
- Last season, Leicester (who were relegated in 18th) should have finished comfortably mid-table (in 12th) while Wolves (who finished 13th) should have finished 19th.
- In 2021/22, Palace (who finished 12th) and Brentford (who finished 13th) should have finished above us (in 6th and 7th respectively)
- Also in 2021/22, Leicester (who finished 8th), Newcastle (who finished 11th) and Wolves (who finished 10th) should have finished just above the relegation zone (in 15th, 16th and 17th, respectively)
- In 2020/21, we should have finished 4th (not 2nd), and Brighton (who finished 16th!) should have been just behind us in 5th.
- In 2019/20, Newcastle (who finished 13th) should have been relegated in 20th, and Spurs (who finished 6th) should have been 12th, while Southampton (who finished 11th) took 7th and Everton (who finished 12th) took 8th, ahead of Arsenal (who actually finished 8th) in 9th.
- Also in 2019/20, Watford and Bournemouth (who were relegated in 19th and 18th respectively) should have finished in 14th and 15th.
The final example (as you touched on it yourself): according to xPts, Liverpool should have finished 2nd, around 12 or so points behind City, in 2019/20. They apparently achieved nearly 25 points more than they should have, while City fell around 6 short. Liverpool (begrudgingly) were quite clearly the best team that season, but going by xPts, they got extremely, extremely lucky. Even Leicester weren't that far off the xPts winners in 2015/16.
How can this daft metric be remotely reflective of average performance levels when it's so regularly wrong about what the "average" performance gives a team? If Manchester United are regularly attaining more points than we apparently should have (we're currently over 10 for this season, and apparently had 8-9 more than we should have last season - you also have to go back to 2019/20 for the latest season in which we had fewer points than xPts), while Newcastle and Brighton are regularly attaining fewer actual points than xPts, then it seems likely that it's a metric missing some some factor(s) when it's being calculated.
About the only thing it seems to give you is a broad idea of the very best teams, and the very worst teams (and even then it can be wildly inaccurate). It struggles with basically every team that's not either consistently very good or consistently quite shit. The fact that you've basically acknowledged that it doesn't really take "grinding out games" into consideration, a key part of winning titles and establishing yourself as one of the best teams, says it all.
xG and xGA have their own flaws. Chiefly, that they're cumulative measures and can be warped by one team having loads of speculative shots (as you managed to accidentally highlight when you brought up Everton having 22 low quality chances against us), and that they don't reflect excellent goal scoring opportunities in which an attempt on goal doesn't take place (e.g. a player fecking up a square ball for an open goal tap-in).
These metrics, with a lot of other context, can probably help paint a nice broad picture, but that's not how you (or pretty much anyone else on here) are using them, even if you keep harping on about them showing signs of progression or average performance levels.
I'd also like to see us play games with more control and comfort, but as someone who has repeatedly dismissed our injury woes, you're failing to acknowledge that our disjointed line-ups, that frequently feature a majority of second and third choice players, means we haven't actually managed to consistently field "a decent to good side".
As I mentioned in the post you've quoted, we've been completely unable to put out a consistent side.
In defence, Maguire, Lindelof and Evans have just one fewer league appearance than Varane, and twice as many as Martinez. Dalot has twice as many Shaw, who has the same number as Wan-Bissaka.
In midfield, McTominay has nearly three times as many appearances as Mount and ten more appearances than Casemiro, who has just one more than Mainoo and Amrabat.
Our forward line has been about the only consistent feature, and that's reliant on two under 21s, as Rashford and (more so) Antony aren't pulling their weight.
For some extra context, here are the players with 20+ league appearances for the clubs in the top six:
Liverpool (11 players) - Alisson, Gomez, van Dijk, Alexander-Arnold, Elliott, Mac Allister, Szoboszlai, Salah, Gakpo, Diaz, Nunez
City (9 players) - Ederson, Walker, Dias, Ake, Rodri, Silva, Foden, Haaland, Alvarez
Arsenal (12 players) - Raya, White, Gabriel, Saliba, Zinchenko, Odegaard, Havertz, Rice, Saka, Martinelli, Nketiah, Trossard
Villa (12 players) - Martinez, Cash, Konsa, Digne, Torres, Luiz, McGinn, Kamara, Bailey, Tielemens, Watkins, Diaby
Spurs (10 players) - Vicario, Romero, Porro, Udogie, Hojberg, Sarr, Kulusevski, Son, Richarlison, Johnson
United (8 players) - Onana, Dalot, Fernandes, McTominay, Rashford, Antony, Garnacho, Hojlund
We've got the lowest of all of them. Half of ours are attackers. There's one defender, and that's a right-back that's also had to cover at left-back, and one of the two midfielders is Scott McTominay. That doesn't even mention the number of players those other teams have with 18-19 appearances, while only Varane (with 17) separates Jonny Evans from the above in terms of appearances made.
It's all well and good saying you want occasional dominance against "sides who are clearly worse" but how many of those sides have we actually been up against, given the line-ups on the day? Slightly worse for some of the bottom sides, I'll give you that, but I imagine if you actually looked at the eleven we've fielded, none of the Premier League sides we've faced have been "clearly worse".
You seem to view us by how strong we should be on paper, rather than how strong we actually are, which I suppose tracks with your obsession of xPts and xG rather than actual points and goals.
Again, I get the frustrations. I get that we've had crap results and performances regardless of the wider circumstances, but this idea that we should have been showing real signs of progress from last season when we're 26 games into a league season and are still having to patch together the defense and midfield out of whoever can sort of play there and happens to be fit is a clear mitigating factor that you're repeatedly ignoring. There are tactical issues and possibly even training issues, but these are separate to this constant barrage of "but the stats say..." that you keep bringing up. Even a solid tactical set up would fail to show any sign of progression when it's having to include Lindelof at left-back and McTominay anywhere on a regular basis.