Which would you rather discuss, based on the OP: What are the issues at Man United, or what are the issues with Jose Mourinho?
The first interest me more, and while this interview doesn’t say much - knowing Joe - then whatever in it can be seen as a polemic inuendo, probably is. So the player he bought/got and built his team around, Pogba, is pointed out, yes, but also made clear it goes much deeper. Martial is pointed out, but it goes further.
The ‘2nd place was brilliant’ comments repeated repeatedly to me suggests two things: He was not content with the player pool, and given that many of the players arrived at his watch, I take it to mean that he wasn’t happy with neither the process of bringing players in, nor the lack of players moving on, particularly in his first and third summer window. This is fairly consistent with interviews he’s made previously. So it’s Woodward, of course, but possibly also Marcel Bout, or even the whole set up.
I’m guessing Mourinho would have moved on Mkhi and Shaw fairly early on, and Martial and Pogba when he saw that they couldn’t or wouldn’t adapt or develop thwir game as he wished, to bring new players in. We know he complained about low confidence, immatture attitude and lack of tactical awareness. I’m guessing he implies that the set up can’t identify these factors in a player, and doesn’t support the manager when he needs to move someone on to improve these aspects of the squad.
We know Ferguson did such numbers constantly, he could ask for a player, or develop a player, and if he found he didn’t have the right personality or whatever, he would move him on snappish (like Veron, Ince, Sharpe, Beckham). This is how he would rebuild the mentality of the group.
Mourinho was a breath of sour air, possibly a dinosaur (I’m not so sure about that yet) and with a short term personality. But if he’s still right about meeting obstacles in building a winning group of footballers from within the setup, I suspect Ferguson, Solskjær and anyone else would also struggle with that.