He's just an average manager who's stand out achievement is a Semi final of the CL in 2019 which whilst impressive said maybe as much about a great team he inherited with DeLigt, Van Der Beek, De Jong as much as it did about him. In all other seasons, he didnt get out of the group.
The job is clearly too big for him and it never recovers from this stage with a manager where the team look lost and just stop playing for him.
My money is on Tuchel until end of season. There are very very few good managers around and Utd have tried a)Big names in Jose, Van Gal b)solid low key fundamentals in Moyes, Ole and now Ten Hag who I struggle to describe. He's sortof low key with zero fundamentals. I think Utd need to thread water for a bit and build up from scratch. Ditch the toxic players, stop signing mega "stars" who invariably flop. Get top 4 maybe this season and build from there. Wait for a "top" manager to come available and grab him ruthlessly (sack whoever you have to do this).
Your big issue is fans from the arse end of Asia demanding ******** "star" signings and do you move wildly on the waves without any direction. I think Van Gaal would have been ideal but he's too old now, he had a plan. Most of all you lack a plan. Keep your ear to the ground for the next big manager and go all out to get him. £20m a year deal.
Alternativlely sign Southgate until end of season, be amazed when he flukes top 4 and then give him a 3 year deal. Then in a years time when hes shite, sack him and appoint *insert name of aging faded "top" manager here*. So the show goes on and on. In the summer sign Greizmann for £60m to absurd youtube welcome video as Casimero departs through the back door for Saudi.