I studied a bit of psychology lately and I learnt how easy one can manipulate others if he has the means and the motivation to do so. Basically our brains is built to filter through a horde of information (ie smells, visionary stimuli, sound stimuli etc) and make sense of it. We're built to avoid complexity when we can. United have both.
The club will never go out and say that Ole was shit. They will stay silent, they'll replace him with the manager everyone wanted, the poor guy will be brought in thinking he can get anyone he wants and will clearly state so and then....'information' will start 'leaking'. Rumours about how players turned us down the moment we made Ole manager simply because he was just a rookie, how Ole refused to sign Pepe (if he's scoring 20 goals per season) because he got obsessed with Daniel James, how the ship sailed for Partey because he wasted precious time chasing Longstaff and how Dybala added 10m on his salary offer simply because he thought that our manager was a turd who couldn't find his way out of the loo let alone manage a top club. Little by little Ole will be turned into this idealistic rookie who took a job that he couldn't handle and had to rely on Giggsie's (James), Carrick's (Longstaff) and Sir Alex's (Maguire) judgement to bring in players. There's a reason why nearly an entire population of family oriented & religious people who believed that a Jew was God ended up backing a mad man who killed millions of Jews. That's the power of propaganda.