Of course he was right. About the shite defence. About Pogba being a fairweather player. About most of the squad being spineless.
But he also signed Lukaku, Bailly, Matic, Fred and Sanchez. He played Young and Valencia over signing new full backs with actual talent. Failed to sign a centreback in his last summer. He behaved so caustically that no one listened to him any more.
Now how much of that was entirely his fault is up for debate, obviously nothing is black and white with a board as shambolic as ours. The incompetence of the board was always a bigger problem than Mourinho, but Mourinho still made himself a part of the problem and had to go.