>>51960331He's not as hated as some people try and claim. Not everyone likes him, of course (just like any character), but he gets a decent amount of fan art from Japanese artists (and from others in different countries). If nobody liked him, he wouldn't have a fan following on social media.
I like him, and hope that he stays, but I don't think he can carry a series on his own, so I highly doubt he'd stay while Ash is retired.