Nah I don't think that's enough to see a pattern, I don't believe the players just can't be arsed because it's an FA Cup tie. We would've gone through with the team we put out if we got to play Tranmere, Forest or Reading.
So how did you end up losing to a shit West Brom and Championship Wolves at home then in previous seasons?
I don't get how you can say that's not a pattern. Since Klopp got the Liverpool job, of the currently established Top 6 teams, Arsenal are the only other team to fail to reach Round 5, and they've only missed out on it once, while Liverpool have missed it in all four seasons.
Liverpool last won the FA Cup in 2006, so if we go from the season after (2006/07) to the season before Klopp took over (2014/15) and look at the number of times each of the currently established top 6 missed out on Round 5, you'll see the pattern even clearer.
Liverpool missed out five times (la) in those 9 seasons, once in three consecutive years, but that included two exits away to United and Everton, with the other being a year they finished lower than 6th. They also lost to Arsenal in one of them, and the other was also a non-top-6 finish.
City missed out four times, with two coming from finishes outside of the top 8, never mind the top 6, and another being a defeat to United.
Spurs missed out six times, with two being consecutive away defeats to United, during which they finished outside of the top 6 in one season, and outside of the top 8 in another. They were also knocked out by Arsenal away one year.
Chelsea have missed out just twice.
Arsenal missed out just once, and that was to City away.
United missed out three times, once coming from a season in which they finished outside of the top 6, and another coming away to Liverpool.
Just had a quick look. United has never even had to face a PL team before the sixth round of the FA Cup in 2015, 2016, 2017 and 2018. Last time you did was in the 13/14 season, against Swansea in the 3th round which you... lost at home.
We faced Huddersfield in Round 5 last season, for one. Also, what relevance does this have when Liverpool haven't faced anyone in Round 5 or beyond since 2015?
This season you were knocked out by a team below you in the Premier League. Last season you were knocked out by a team that finished bottom of the Premier League. The season before you were knocked out by a team that finished 15th in the Championship, after being taken to a replay by a team from League Two.
West Ham actually finished above you in Klopp's first season, which might make that one somewhat forgivable, but even that season you were taken to a replay by a team that finished 14th in League Two.
In 2011/12 United had City away in Round 3, followed by Liverpool away in Round 4. When you last managed to progress further than Round 4 (2014/15), you got all the way to the semi-final and only played one Premier League team, and that as 10th placed Crystal Palace in Round 5.
It's luck of the draw, but Premier League teams can expect to avoid each other in the first couple of rounds, or at least avoid drawing the top 6, more often than not.