Most of these points I have already replied on in another discussion thread, so I don't want to repeat myself. I have talked about that rebuild project everyone seem to be talking about and in comparison to the previous managers.
As for Moyes, he inherited a title winning squad indeed, but a squad with most of its best players being old ones playing their last few seasons, some mediocre players that were covered by SAF's abilities and were immediately sold by the next manager after Moyes. This squad needed a massive rebuild, Moyes didn't get any of his signings he wanted and had to sign Fellaini because of no one else available, sacked 8 months in his 6 years contract and wasn't even given a 2nd transfer window.
Not saying Moyes would have succeeded or deserved to stay, but the reality is Ole got the most time, the most backing and achieved the least among all of these managers. If these managers are all shit when they actually achieved more than Ole with less backing and less quality, what that make of Ole, the guy who splashed more than 400m in 3 years and his team still look shit and disjointed mess ?
There's nothing reactionary in it. He's an awful coach. Always has been.