De Gea is a good enough goalkeeper I know that. He is experienced. But Onana is not a bad goalkeeper. And the decision to add Onana was the right one. Onana may not be as experienced as De Gea. Even so, Onana's performance is not worse than De Gea's. Manchester United conceded 7 goals in 4 matches. Onana is not the only one to blame for this. Manchester United have tactical weaknesses. At the same time, the weakness of their defense has been very well visible in every match. Ten Hag should deal with Manchester United's defence. If the defense is not strong, this team cannot stay on top of the points table.
There's alot to handle in Old Trafford, Erik Ten Hag working on that and hopes to fixed these issues in immediate time given. Manchester United will improved with time, the coach have the best players to handle, all what they needs is just time to progress and adapt. Erik Ten Hag made the right decision when he signed Andre Onana from Inter Milan. He's the first choice of united and have made both crucial saves and blunders in league games, perhaps the Red Devils are having challenging moments and weaknesses are open to their opponents.