I think the issue is a minor point of the story you may have either not gotten to or forgot. The reason she looks like she does is because the mentality she had while being kept from the MC, her father, was to one day be strong enough to "kick his ass" and she knew he was in the military and remembered him being strong and fit. She worked hard to tone her body and be extremely athletic. I will admit that sometimes her facial expressions are a bit off but I assumed it was because I have this on android and I think the rendering may be different but she is not unattractive or a bad model. In fact, as a muscular woman, she is still very much nice to look at. As the replies to this before me have stated, everyone has their own personal preferences and there is no single model type that will please everyone. Hope you can get past this and enjoy the story.
I empathize with this so much, I'm genuinely not trying to be judgmental if thats peoples thing power to them. It just has a strange effect on me where as soon as I see her come on screen its jarring and bizarre to me and immediately pulls me out of the immersion DESPITE the fact that the writing explains it and adapts it to the story perfectly. I just its just one of those things I can't get used to and I really wish I could because the writing is publish worthy.
Its been a while since I played as I have been waiting to play every other update, but iirc, in addition to her father inspiring her to look like an amazon, she was also bullied as a young girl growing up without her father who was out of the picture by then. Her getting stronger and working out helped give her the confidence to not take shit from anyone and actually helped her stand up to the bullies that were picking on her new school friend.
Its also probably helps explain why her new confident and dominating personality attracted one of the bullies to her, to where she actively begs to be punished by her and tries to seduce her. While I love gingers, I can also appreciate her not having a conventionally attractive body, but still be very pretty to me. If anything is frustrating me, is the MC finally acquiesces to her desire, but then continues teasing her and not giving her what she wants most....which is only driving her insane with sexual lust and frustration to where she is actively considering pursuing being with other girls. I don't have a problem with her experimenting, I'd just prefer for her to keep it in the family with Deb and the other ladies at the house.
While I get why the MC was so angry with Deb and the rest of his family (outside of Milly who didn't know), but I was really hoping he'd get over it by now and realize why they did what they did and just how much Deb loves and has always loved him.