Manchester United have several good defenders, that position shouldn't be their problem but getting a better goalkeeper, Onana made lots of errors last season I wonder whether you didn't notice it, if he was manageable the club would've focus on the defends instead thinking of a replacement.
Onana performance was so poor last season, I was thinking the first thing that Manchester United will do is get a new goalkeeper when the transfer window is open, but they didn’t do that, but seriously Manchester United just need to sign a better goalkeeper, I don’t really know if Onana performance is going to improve, they just need replacement for him, they shouldn’t depend on Onana completely.
Everyone have been complaining about Onana, but I guess we are not suppose to blame only Onana, I think we should blame the defenders also, Manchester United defense is not that strong as you said, there are some balls that are not suppose to get to the goalkeeper, if Manchester United had a strong defense last season, then they will have been able to protect even the goalkeeper, but they have a weak defense, so their opponents are always finding it easy to break.
I agree with that, because if their defense were strong enough, they probably wouldn't have conceded 54 goals in a single Premier League season. And in that season, they conceded more goals than they scored. Manchester United is indeed filled with expensive players with high salaries, but unfortunately, their performance and achievements don't match it.
And what really bothers me about Manchester United is that a few seasons ago, they replaced their best goalkeeper, David de Gea. Because De Gea had made several blunders in several matches, they replaced him with Onana. But in reality, since Onana arrived at Old Trafford, has Man United's goal really been safe? His blunders have probably been countless. Now, David de Gea has returned to his best form, he's been performing well in goal for Fiorentina, and surprisingly, Man United wants to bring him back to Old Trafford.
Furthermore, there are already quite strong rumors that Man United will bring in Emiliano Martinez. Hopefully, this deal can be finalized.