Nooo why are you doiiing that to meee?!
Ahem, I tend to hate friendship endings in games, so it may impede me from 100%'ing the game XD - but don't worry, that's my own issue.
Though now you made me curious - why should his route be a turn-off to some people? I mean, not asking for spoilers about events here, but rather I'd like to know if you're saying that because he's an antagonist per se, or if some elements of the route or the character's behavior make you fear that?