GQuuuuuuX is hetbait because besides him and Machu kissing Machu is almost entirely concerned with either Nyaan or Lalah for the last few episodes, she literally has to be reminded he exists by Nyaan in episode 11 and when she and him meet up again she only talks to him about Lalah’s wellbeing. Hell, during her final monologue she’s basically just calling him a bad Newtype while telling Nyaan the exact opposite message about herself minutes prior, you could remove the confession and kiss and nothing about the narrative would change. It’s such an inconsequential part of the story I really can’t say anything about it, because clearly the writers themselves didn’t care enough about it to make it at all compelling.
Friend, I wish I could do this, but the confession and kiss isn't just some random thing, it's the climax of the entire show and what solves the central conflict, since it's what impels Shuji to give up and the central conflict to end. Not to mention that the last line of the anime is entirely about Shuji. It's not hetbait, the het relationship is just incredibly badly written lol.
Which is why I said, this doujin is gqux if it were good :p