Wilder vs Joshua would be a good fight to watch but inevitably Wilder would win. I think he would KO Joshua within 5 rounds.
I hope Wilder recovers from his injuries, he proved many of us wrong because he fought valiantly against a brilliant Fury but ultimately it was only going to be Fury that won. Wilder did well in that fight, he should take pride in the way he tried to take the fight on the front foot unlike what he did in the second fight.
Again, to bring back his confidence, he should fight b-level fighters knock them out. In that way, he can feel good about himself. The road might be long, but that's the only way he can bring back his mind to become a champion again.
Wilder is currently trying to recover his broken hands against fury a few days ago and in some media, wilder's coach said that if wilder is currently refusing to retire after breaking his hands and reportedly wilder will again target a comeback fight in May 2022 against Anthony Joshua, and of course if the fight can be realized of course he will be able to improve his career record after the defeat against fury.