I think Manchester United weak defensive line also contributed to Onana poor performance as a goalkeeper, compounded by the pressure he was under as De Gea replacement. Ten Hag preferred Onana for his playing style, which he said was better for ball retribution from behind. However, I see that Ten Hag actually wanted to build the same team as Ajax, but in the end, it didn't work. It's clear that Manchester United overpaid for him, Onana failed to live up to expectations.
Everything is interconnected now because, after all, looking at what has happened, even though we know that Onana's performance has been quite poor, this is also influenced by several factors such as a weak defense and a scheme that does not meet expectations. So, even though Onana has performed poorly, we cannot entirely blame him in the end.
Manchester United is currently in a truly in recent seasons, and this must be addressed immediately. However, making improvements is not as easy as it seems. Looking at what has happened so far, many efforts have been made, such as replacing the coach and shuffling players, but in the end, there has been no significant impact on each move made. What was hoped for by trying to replace and reshuffle players with good intentions has ended up in a situation that is more difficult than imagined .