I hate when the english isn't good, it completely ruins the immersion even if the art and overall story is good. This isn't always the creators fault tho
Even if you start out hating her, I start feeling bad for them when the power-dynamic shifts and they become vulnerable and meek. I just feel bad for them because they're being abused even if they deserved it to some extent
Future Love Space Machine (FLSM) by ripened peach is a sex simulator where your create alien creatures to have sex with where it's not just a green human. There're also a couple of side-scrollers like Arma's Quest (more for furries tbh) and Castle of Temptation
Personally, I like games where the side girls routes are pretty fleshed out, but it's just a quicker romance than the main girls. A good example of this is Mythic Manor.