The situation at Manchester United is slowly getting out of control; it wasn't like this for them, and the club's culture makes it uncomfortable for them to even perform well. They have been struggling for a long time, and even with the addition of players, nothing has changed, which isn't helping at all. However, it appears that they are dealing with an internal issue because they have been too stagnant for a long time. And they have not been able to fix what the major problem is so they still have a long way to go, because I don't think they have a solution yet them self because they keep failing so they need a new coach or even players.
They have an internal issue which they haven't found out the solution yet and if you advice for them to go for a new coach I'd say no to that because for the past 3-4 years now they have been changing from one coach to the other which doesn't say they are on track or they're doing the right thing. But if is in the case of performance I'd say they are improving as of this season, yes, they are doing well and when the player Cunha said "this is just the beginning" I agree with him because they look like a team that want to show that sign of dominance but they were unlucky in their last game against Arsenal, if that same energy is put on in their next game I see them getting all 3pt, this is the change we are expecting and the fans will applaud the players for how well they did in their first game, knowing how poor they were last season.
The board should never make the coach be under pressure in this fresh campaign, like they should solve their problem on their own and let the players and manager do their thing, this set of players they have can change things for good.