What's the point with that quite lackluster story in Endwalker?

[CrownySuccubus]

And of the 3 pretty boys you've just posted are mature adults who behave as such in FFVII

Again, that is your individual, personal opinion.

I do not want this in my party or for the game to keep forcing this on me without me having any say in the matter. Shove it into side content. Get this character off my screen.

To paraphrase yourself, it sounds like you want to play a Persona game, where you get to pick and choose who you hang out with. Not FFXIV.