His dick size is the least of his problems, he's a fat social retard with a huge complex and non existant self-steem and confidence. And he's also a virgin. All of that is what makes it impossible for him to get a girl like Lena and be able to satisfy her. I'm not going to say that size doesn't matter, it matters to a point but unless we are talking about extreme cases like a micropenis it's more a fetish for these games and something we men tend to obsess over rather than a real issue IRL.
IMO he could have worked as a simp. For all his faults, he has a good IT job which probably means more than decent income and money to spare. My idea was trying to roleplay Lena as someone who is aware of how Stan feels about her and only sees him as an easy to manipulate money source. Basically what many female streamers do with their audience but at a smaller and more personal level. But the writing hasn't gone this way and now Stan only could work as a deranged pyscho threatening Lena and/or Louise for Ian (or another LI) to beat or the utterly unrealistic love path with Lena.
The game is also missing an asian girl to cover everybody's preferences.
I think that the plot hints at something like that, but I'm not sure what Patreon and Stream policies are regarding rape content. So probably something lighter like drugs involved to lower girls' inhibitions but also showing clear consent. More similar to alcohol than roofies.
I guess... I never have been attracted to asian gals... to me out of all races they look the most... different than the rest. The few I have been attracted to always was because of features they had that were not typically Asian (normal or big eyes rather than thin slanted eyes and big breasts as opposed to small).
That said, personality can win me over in spite of looks, but in this game, none of the gals, not even holly, really has much about them that draws me other than their body.
For games where each female has distinct personality and you have to at least put effort into the relationship or even understanding them well enough for them to agree to mate with you... try Leaving DNA.
You click fast through that game and you won't get sex scenes unless you already know what to do.