Mbappe has ridiculous control there, he can get away with jogging half arsed knowing he's on a stupid salary and completely indispensible. They gave him stupid wages which was just a backwards decision, I want a proper wage structure at United where players know they need to be on their toes to earn their wage.
They bought Neymar, Messi, Mbappe as a front 3, on god knows how much wages and it wasn't a smart model, in fact even when Messi completed the trio there was a lot of fair opinion that it was not going to work and was just a FIFA team. Low and behold, it doesn't.
Messi does what he wants, Neymar works hard when he's on the pitch but comes with his own problems off it, Mbappe will threaten to leave every now and again and the managers are resigned to making it work because of the immense salaries these players are on.
Also their CEO threatened to kill or beat up a journalist after they lost a CL game, which just points further to what a stupid circus it is. Tuchel didnt leave on great terms, and Poch was sacked when I think he could have had more time, PSG look worse since he left.
They're just a shit club. They win a one horse league and underperform almost every season in the Champions League. They also sacked 2 very good managers who, if given time and control, would have likely sustained better or at least the same results than what happened after they left.