>>30748031He's a dick. Not an interesting dick, just a dick. Even when he gets his ass handed to him so often, he just brushes it off and pretends he lost on purpose. Never in the original games was there a point where he grew as a character. The only reason people find him memorable was the twist where he became the champion just before you defeated the elite 4.
Other rivals respected your strength, battled for the fun of it, found you likeable, or at least grew as a character.
Blue was "the asshole who pretends he's better than you at everything just because he dicks around in the grass all day and picked a fucking turtle".