The render quality of this game was top when it was released and it is top now. The render engine is raytrace, so tell me a game above that. Anyway, the technology you use is not really the most important thing. I can render you a cube with fancy lights in Full HD, but we're not talking about this. Textures? character detail? I think this game is top. Illumination, scene arrangement, scene direction... I think it's pretty OK for a sandbox game. Now you can say you don't like it, your opinion is totally respectable, but technically it is a top game, and that's not an opinion, it's a fact. Now you can name 5 AVN's (modern or not) which are above this game in aesthetics quality beyond any doubt.
Now I think you're talking about a different game. That's not only false, but also this game is one of the few you can see well done kissing (I only saw them in this game and in Timelapse, tbh), and animated characters don't have half of their bodies frozen, as most of other games have. There are characters (Linda and Caroline, for instance) with about 10 scenes with 7 animations each, this is 150 different animations both. And yeah, I'm talking about animations with more than 100 frames. Really, I think you're talking about a different game.
You can like the game or not, you can like the style, the characters, the story, the ambientation, or you can hate them. You can hate the dev, too, I've heard he lies too much and works too few. That's what tastes and opinions are about. But technically this is still one of the top AVN's out there. I don't think that can be arguable objectively.