You are right. The club has been experiencing poor performance since the departure of Sir Alex Ferguson. The coaches should not be solely blamed as Ferguson was able to be successful at the club due to the fact that he had significant control in the club. In my opinion, Manchester United will continue to see coaches come and go without long term success if they don’t fix their internal problems.
Management has tried continuously to bring in good coaches to train Manchester United, but the results are still far from what is expected. In my opinion, the next evaluation that must be done by management is of course to overhaul the team in this summer's transfer window. I see that Manchester United is showing interest in Osimhen and I hope they can recruit him to close the gap in the front line.
Even Manchester United's defense line this season is very fragile because they have conceded a lot. In the 29 matches they have played where they have conceded 40 goals, of course this is a season for Manchester United with a very fragile defense. I think they will not hesitate to buy new players and sell existing players to add new strength for next season.