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.
I am with you,I see it seems the boss have a temperament that makes him react quickly,this reminds me how he pushed Christiano Ronaldo away from the club,and how he started feeling bossy over the players,those things are what used to make players start having little issue with their coach.The moment he is able to call the attention of all the players and address them.one by one,try to build love in them again,I think the players will come to his point,and do exactly what he asks them to do on the pitch,and one thing I know about this United team is,the moment they determine to get something,they always do,and that was why they won City in the FA cup final.