You nailed it with all of that. The players are not at fault. The problem comes from the developer, who has low quality standards and didn't take the time to polish the story or the dialogue. You can make a good story without making it creepy or weird. There are cases where little girls have a crush on someone older, just like it happens with boys too. You can make the relationship develop slowly because she or he is inexperienced. Or, if the dev is interested in making a darker storyline and using something that actually happens all the time, they could make a grooming story arc where one of the girls is talking to some stranger on the internet and the MC finds out and helps her or something. There are tons of things they could do. Aside from that, like you said, the conversations are really bad. It looks like the dev used ChatGPT because I don't think normal people talk like the characters in most visual novels.
Just to be clear, because it looks like zesergeant misunderstood what I meant when I talked about making the story more realistic, I meant making the things that happen more realistic. Like you mentioned, don't make Thorben look like a caricature, don't make the women fall in love with the MC at first sight and send him naked pictures the same day they meet him, don't make him a perfect man who always says and does the right thing, and avoid cringy dialogue, like when he comforts the oldest daughter by saying that she is the most beautiful girl in the world and that she is perfect and not fat. All of that makes the game feel like it was written by a teenager. The game is so rushed that it looks like the way this dev will milk money from it is by adding more and more characters, because if the women are willing to have sex with the MC from day one, what will happen by day ten?
Oh I think I understood, but I just kind of wanted to... show the bad part of making it "too realistic", if you know what I mean?
I don't mind sexy things happening quickly, with Elena at least, she can be a special case among the girls, for instance. First time she's comfortable around a man, sits on his lap, and feels the boner, don't know how to handle it, but cunny feels good, let's rub. She can be a bit overly sexual, because she feels things, and don't know what or why etc. That way you can have at least a quick loli LI without it going overboard fast.
The other girls would be better to take a more cautious/slow approach to. You can still have like pervy scenes, like him helping them bath as the 'new dad' or something, slow corruption while helping them wash, as that would be more believable. Or cuddling on the couch watching something, letting hands wander a bit, not explicit, but an "accidental" touch here or there.
I don't understand why devs are afraid of making actual chubby girls. Like they call Sophia fat, but she just looks like she has (unironically) a wider bone structure. There's no real fluff on her, and that confused me when everyone started calling her fat.
The only two I can think of - off of the top of my head - that does this right is My Dorm with Kate, and Whoremonger with Olivia. All the others mostly go to "wide bones" or "Jabba the Hutt's fatter sister".
I do agree that the dialogue could be better, and that everyone is moving too fast, basically. I would give Maria a pass here too, though. She's been stuck with the worst human being in the world for years, and now her White Knight Prince comes along to whisk her away to a better life. So she trades an asshole for a better man, and she goes overboard with her feelings because she's afraid to death of being alone.
The rest of the adult women should be a bit slower with the whole love angle, though, but sex? Sure, they've been alone for a long time, they know that sex feels good, so why not? Sex first, feelings build up after is fine.
But yeah, the whole "I love you" instantly, and such is a bit too much for me too. Maria once again gets a pass, because of the reasons mentioned, and you could look at it like she's saying the "right" things, or at least the things she THINKS the MC wants to hear, for him to stay with her - which could also explain why she would be open to Harem (rather share, than risk losing him).
Writing/story I'm OKEY with, but I do think the dialogue is the weakest point.