Vox wasn't being "inconsistent" or "out-of-character" in the flashback with Alastor, he sincerely had fallen in love

I absolutely hate seeing this take so much, because it totally fails to understand the scene and why it meant so much for Vox, someone who always tried to have power for himself and betrayed other's.

This was Vox's first time being genuinely vulnerable and real with someone, not seeking to use or exploit them but treat them as an equal. And Alastor tore him to shreds. It doesn't help, as Viv confirmed, he had internalized homophobia since he's from the 50's (why he's always so unhappy in the Vees pride merch).

Viv even confirmed he was acting this way because of a crush, Alastor was that special to him

At 34:00 of this interview is all the confirmation you need

https://www.youtube.com/watch?v=Hfc7InvBevk&t=1569s