People need to chill, it's a genuine question.
I think it has to do with..
1. Small hope that Ole could replicate back the awesome football (Dec 18' - March 19') the players performed and his decisions making when he were the caretaker was almost everything spot-on. Slim chance this will happening of course but who knows. Why Ole became so "scared" or "stiff" in his decisions makings later on, or even "naive" I have no idea why he insist on it. Caretaker Ole have nothing to lose, Manager Ole have something to lose eh?
2. He hasn't really given any transfer windows or summer pre-season to "fix" his team. The Jan 19' doesn't count since he's the caretaker at that time and I doubt he has any strong say to the transfers in nor out and even contract renewal. He's just the poster boy for the contract renewals news. He did claimed to offer his opinions to Ed but seriously is Ed going to listen to a caretaker after few amazing runs of football? no way (mind that this is in Jan, Ole became the caretaker late Dec, games are too few). Only after Ole established himself more with more good results which he then rewarded with permanent manager contract in late March, and now Ed have to listen to the manager, or it won't be "justified" sacking him afterwards if he have to.
3. Club gave him permanent manager contract (just at the end of that amazing run and few games after the start of the shit run ironically) so they have to abide by it, it's "ridiculous" as in making them more laughable being as they already are a big joke, if they sack Ole after 2 months late season with no chances given to fix the team.
4. Doubt this is a reason by the club management team -> but we know Ole care about the club. He will do all he can. Unfortunately ever since then, there is a big question mark over his managing, mental/character (as manager) and tactical skills. Start of next season is time for him to show his worth. Just care is not enough at top level. There is also question mark over his adapting and learning skills, thing is... his reputation now is a low level manager.. the least he can do is to show he's willing to learn and adapt quickly.. but there are no signs of that, and instead he opt to do bad decisions making and seriously sticking with it up until towards the end of the season.. even a stupid pointless final game, so depressing.
5. Club are managed by incompetent leader and his followers who have no proper planning nor good ideas about how to run a football club, football wise specifically, not commercially. I'm sure they have zero idea who to hire.. either just listen to Fergie's consultation or get any top form and/or top reputation managers (LVG and Mou) available in the market. It's fine to listen and consider Fergie's advises but it's what they do with it that are the problems. Hiring Ole is right, we did switch it up and had that amazing runs (just see the EPL table eversince Ole takeover, United is at top 4 iirc or at least during the end of the best momentum), but then that permanent contract decision made by the club (not Fergie) is ridiculous.
From what I see, club should have two options; either a. hire Ole during the top momentum but only for one and almost half year as in including the remaining months of last reasons or b. wait until the end of the season, let him be the caretaker until the end and only then make proper judgment. Nope, they hired Ole during the end of the momentum and already started shit runs, and even a ridiculous 3 years contract or something.. my gahd, that's terrible. Give him 1 year max contract, then extension option, should be the way to go if they're hiring him perma. Sacking a legend doesn't feel right, better to let him go if he fail. Meh, whatever. The justification for sacking Ole next is bad results, but again that would leave a bad taste and another improper planning reputation by the club... they're on a roll. If Ole proved to be a goldmine, who knows, then they can hide their incompetency.
Not even given him a chance.
The state of some morons.