And your basing this on what?
Playing the same 11 players irrespective of form all season resulting in second half of season collapse; only ever having plan a "a"; refusing to use substitutes; not bothering to buy a right back for a year; playing RB's at LB, and centre backs at RB; having no scouting system to speak of; having no confidence in our youth system and thus refusing to invest in continuity; squandering resources bringing in second rate players on scandalous wages and not playing them; generally struggled in the transfer market; lost the dressing room (GH never had the dressing room as the lunatics were already running the asylum)..... and so much more.
This is not good management.
I will admit MON was the right man when he joined and credit is due for a wembley final, finishing 6th 3 times, buying Ash, Milner and Delph, always showing passion on the touchline and in interviews and generally respecting the fans, but he did not build an empire, he was an of-the-moment manager. He ran off like a coward - it was his bed and didn't fancy lying in it, says it all. I lost all respect for him after that.
You should post more often. Whether people agree with that or not, it's very succinct and well reasoned. FWIW, I agree with a lot of that; especially the bit in bold.