With you saying that it is also not certain that Erik Ten Hag will remain consistent, so the club management takes quick steps before falling further, therefore what Man United is doing must be right to find the ideal coach, meaning that they have strong chemistry with the players and especially don't fight a lot.
Chelsea and Liverpool may next season will experience a slight change but we don't know how optimal they are with the new coach whether they will remain consistent or there is a change in friction where competing in the top 4 is much more difficult.
Erik Ten Hag performance this season is of course not good because he is unable to maintain the club level of desire to remain in the top 4 circle so he can play in the Champions League. This season, Manchester United closed the season in 8th place. It is clear that Erik performance in the second season has decreased quite drastically compared to his first season with Manchester United. On the other hand, there is certainty that Erik Ten Hag fate will end with Manchester United, but for that we will just have to wait for official news from the team in the near future.
I think Manchester United fans are quite disappointed with Erik Ten Hag performance this season because with the status of a team that won many EPL trophies, in fact they had to finish in 8th place. Of course there are appropriate considerations to support Manchester United performance next season, one of which might be looking for the ideal coach can restore harmony within the team in order to achieve better targets next season. Tuchel seems to be a good choice if Manchester United officially part ways with Erik Ten Hag.