I didn't really go into the incident that led to criticism of this player's character. But what I want to emphasize is that Andre Onana is still very new to Manchester United, it is too early to speculate about what he did there. MU's main players and coaches must provide understanding to players who have just joined the club because that will help speed up the adaptation process with other players
Andre Onana is a goalkeeper who is still very young, doesn't have much experience, and can be said to be immature because he still has points of gaps and weaknesses when the opponent manages to get a score from a kick in the middle of the field and break through Andre Onana's defense. Hopefully, in next season's match, Andre Onana will perform better and focus so that it makes it difficult for opponents to score goals.
It's hard to say if he Andre Onana has no experience, the fact is he is one of the best goalkeepers I mean we can see his achievements when playing with Inter Milan
They managed to reach final in the Champions League and won the Serie A title this means that Andre Onana has enough experience as a young player therefore Manchester United are interested in bringing it. If at this time the performance is not optimal, maybe he needs adaptation sometimes new players have to understand the characters in the team first.