I agree with most of this and he was never the right choice but for me either but the fact he never seemed to learn annoyed me. Bizzarre selections ( who can for the time he played 4 CBs at home ), weakened teams in domestic cups where are biggest chance of trophies lie, failure to improve the defense etc etc.
I think he is unable to manage a big squad with all the permutations and problems keeping players motivated . Few managers can really successfully .
Stick him in a Swansea with a small first team squad and tight budget he will be fine,