The Red Devils finished sixth in the league last season, but they picked up three trophies - Community Shield, EFL Cup and Europa League.
He said in an Esquire interview: "I accept that we didn't play well, we didn't do this, we didn't do that.
"I know what we did – we won three trophies. That's all I know. And that's all that matters.
"Because you can be the best team in the world, you can play great football and you win zero trophies. And who remembers them? No-one. Right?"