The thing with De Gea is that while I'm acutely aware of all his flaws, I'm still fond of him as a player. And more to the point, part of the reason I'm fond of him is because of his flaws.
For example I know a goalkeeper only being good at shot stopping is definitively a bad thing and a more well-rounded goalkeeper would be a big improvement. But as with poacher CFs who offer absolutely nothing except a near-magical knack for nicking goals, I have a strange fondness for that sub-optimal extreme specialist type player managing to succeed at the highest level. Outliers are a good thing, just perhaps not in the team I actually support.
Similarly while his passive presence can be extremely irritating on the pitch, I still like it in a more general sense. For example, I've seen a couple of journalists note that he spent most of his time at United flatly turning down interview requests and had built no real relationships with journalists over his time here as a result. And while I'm sure that's objectively bad from a career POV, I still kinda admire the general DeGea-ness of that complete lack of engagement.
So I'm very much on his side. I'm just also very sure it's gonna be the losing side.