I think that's an overconfident opinion. It's entirely possible that neither Liverpool or Chelsea will have a coaching problem and have great results, what then? They'll be making excuses for the Manchester United coach again. If something isn't working it needs to change, you don't look at it hoping it will fix itself, that's not how it works. So replacing a broken element in the team would be a good idea
When it comes to the Manchester United, what is broken is the manager himself. He's not gotten that true and real connection with the team players, rather he just work with them as their manager is what I feel. Hence he's not able to get the motivation he needs from.each and every player he needs in his toolbox. All I advice the team to do and the club in the entirely is to sit well and have an open discussion between the players and the manager of the club so as to fix all the differences between them. This is if Eric Ten Hag is to continue as a manager. Personally, I like the guy and he's hardworking but I need him to control himself the more to become more of a sportsman than a boss to the players. Let him.be more magnanimous at heart.
For Manchester United to perform well in the future, the club president needs to intervene promptly, and Erik Ten Hag should be replaced as the coach. There seems to be a lack of connection between the players and the coach, as if the players are disregarding what the coach communicates. This needs to be addressed to reduce the tension and selfishness among the players on the field.