Onana performance varied significantly from a match to another to be honest. He is still young to be ejected from the team but his mistakes cost the team many goals. Nevertheless, the defence line in front of him is defective and sometimes useless so he has to take the blame instead of them in eyes fans. I don't know what's the plan of Manchester United because he isn't playing all games for the moment, from the last one to the friendly ones and there is talks about Manchester United chasing James Trafford from Burnley which are asking for more than $20m to let him go.
I think the overall performance of the team so far this season has also had an impact on Onana’s performance, sometimes it happens like that. In my opinion I think Onana should be left to stay and another back up keeper should be signed to give Onana competition I believe that way he will sit up and better his performance so he does not lose his first choice position to the newly signed goalkeeper.