Not really. Holly is pretty explicitly depicted as an attractive character and is a successful writer to boot. She is shy/nerdy. That's where the similarities with Stan end.
Stan is fat, unkept and a mess. He has no particularly redeeming attributes outside of being nice/gentle.
And besides, the player can't "mold" Stan. He doesn't really change throughout the story.
We haven’t seen any real change in him yet, but it feels like having him evolve on the Stan–Lena route might be part of EK’s long-term plans. The question is whether it's actually worth sitting through all of Stan’s creepiness just to maybe get there someday, and even then, who knows what that payoff would even look like.
The character is off-putting enough that most people probably won’t bother. From what some folks on this thread are saying, the old version of Stan had a better foundation for some kind of meaningful character growth.
Right now, the only real appeal of the current Stan, for the few who actually care to follow his route, seems to be watching Lena use him like some simp and voyeur who’s basically at her feet. It's probably already leaning into cuckold territory, with her hooking up with more alpha-type guys while he watches from the sidelines.
Anyway, not really my thing, to be honest.
