United fans hate the club and the players but love the manager. We finished 3rd last season, we've spent 400 million since ETH was appointed and somehow both "players are shit" and "it's not on ETH" statements are supposed to be true. We've had plenty of decent finishes under Mourinho and Ole too but people for some reason want to portray the players in the worst possible light, making it seem like ETH is managing a bunch of amateurs. I know Rashford hasn't been good this season but how quickly do people forget we'd be nowhere last season without his contribution for example.
I'm happy to admit that Ten Hag could be doing better.
However, it remains somewhat unfair to go "he's spent £400 million" and ignore that:
a) he shouldn't have been in a position to spend like that if the targets weren't right (and yes, this includes not hiring him in the first place, if those were his demands), and
b) that £200 million of that has been sat on the treatment table for most of the season (Martinez, Casemiro, Mount), and the bulk of the other £200 million should never have been authorised at their respective prices in the first place (Antony, Hojlund).
Spending money badly (which you could easily argue is the case for any of Antony, Casemiro, Hojlund, Mount and Onana) because you've failed to provide the manager with a proper recruitment structure (which again, includes not hiring a manager who doesn't want one), leaving him relying on free transfers, a string of loans, and players inherited from managers that wanted their sides to play a vastly different style of football, is a very unfair stick to beat Ten Hag with, even if he could still be doing better in the circumstance (adapting tactics to suit, better in game management, etc.)
I quite often see "look at what our old managers have done since leaving us" as evidence of how bad our appointments have been (and they have been awful), but it's somehow never a factor with the players who've left us, who have almost entirely left us to achieve sweet feck all.
About the only exceptions are Di Maria (who never actually wanted to come here in the first place) and the few that ended up at Inter Milan (Lukaku, Young, Sanchez and Darmian). With the Inter Milan lot, Lukaku has managed to remain a global laughing stock, and the other three were rotation options/substitutes.