Completely disagree tbh. This is the first time we are on course for a comfortable top 4 finish and actually have success in cups, while playing good football. Under Mourinho we played shit on a stick football, yes won some trophies in the first season but finished 6th and ignored the league that year. Van Gaal we had a promising first season, and then shit 2nd season but won an fa cup while being pretty shit in the league.
Even points totals, same boat as league finish. We finished 2nd under Mourinho with 81 points, while a quick understat check says that our xPts that season was 62 points. It was an overperformance of epic proportions. We were 6th in xPts that year... And proceeded to finish around there the following season which was our real level under Mou. Compared to this year, where we are deservedly 3rd (actually technically Brighton is 3rd in xPts this year after this past weekend, very underrated year they are having). Our attacking play is greatly improved, and we have shown very competent performances in a way that is very sustainable. We won a cup, of course piss easy cup run, but we still handled it very competently. Same with how we are doing in Europa League and FA Cup. Ten Hag has a 71% win rate. Far better than any previous manager post Sir Alex (and higher than Sir Alex even, though of course it's Europa and not CL). Our general play has improved tremendously, in a way that we are right up there with City and Arsenal in xPts, xG, xG against and real goals, goals against and points ever since Casemiro started his first game. And we are still maintaining an excellent cup record (easy to perform well while tossing out other cups, much harder to maintain a high level across all cups). The style of play he is implementing takes time and blips were to be expected (though still shit when it happens), but we've seen genuine progress. Genuine improvement across the vast majority of players, with clear limitations in the squad impacting how much we can actually reach where you can see a big step up if we address that. Under Ole and Mourinho, you had the feeling that we were already maxed out no matter who we signed, due to their inability to implement a sufficiently good system. Our home record under Ten Hag is fantastic for the first time in ages. Our performances against big teams at home has been excellent. Very good attitude when we concede generally (barring yesterday...). Had to deal with the Ronaldo distraction in the first half of the season.
For me, it's a no brainer that he's an excellent manager. Yes he too has to adapt and change how he does things, but those are minor and something he's already shown he is capable of doing.