Tbh if you break down what he’s said, it’s not a completely crazy thing to say at all.
His first point is he has “limited pace” - well that needs no further comment, it’s clearly true.
Secondly, “crap in the air” - the stats show that last season he had the 2nd lowest aerial duel success percentage out of every PL centre back. Second lowest. So by current premier league standards, is he crap in the air for a centre back? Yeah, he is if you compare him to others.
Thirdly, “not great at passing” - I’d say this is true too. He’s obviously improved his passing since he joined, but has he improved enough to be called a great passer? No, that would be far fetched.
Then his final point about not seeing Dias in his best form for a long time now is also absolutely true. It’s been at least 2 years now.
The only thing he missed, and the main thing that still allows him to be described as a top centre back in my opinion, is the way he makes the other defenders around him better. He is the glue in defence, the leader, the communicator. And all of those intangibles are crucial to us, as the majority of our players don’t talk on the pitch.