I sense more and more that I'm not the target audience for this particular game, even though it never bills itself as anything other than a typical incest game. I respect that you and a lot of other people like it for it for the pacing or the sexual fetishes is does indulge in.
However, I'll restate that the pace of the game is pretty dreadfully slow in my opinion. There are other games out there that do get into the incest action fairly fast. But most make you work for it. However, they keep you occupied with other non-incestual characters before then. A lot of similar games take this strategy. You're introduced to several characters, only a few of whom are blood-relations. This also applies to non-incest games as well, where the more-desirable characters are meant to be the last to have sex with. There may not be sex in the first update, but by the second or third there'd probably be something with a lesser or throwaway character of some kind. This way things are paced out well to keep the viewer's interest while they pursue their main romantic interest, and lets the developer take things slow with that progression.
Bad Bobby does none of this. It's just denied us anything sexual for just about all of the game, except for those who get off on footsex, or masturbation, or watching your mother get raped via something you set up. We're introduced to the concept of the shoplifters early on, but nothing happens there. They could be the easy sexual conquests early on in the game that give us the release we need while we wait for things to build with characters like Lucy. There's that one girl that I vaguely remember gives Bobby a blow job, but that was long ago and there's been no real follow-up or progression there. Or there's a total of four women in Bobby's house. This far into the game, it's not unreasonable to think we'd have had more happen with at least one of them.
I'd also argue that the last scene with Lucy was absolutely horrible from my perspective. It was outright promised that we'd get to have sex with Lucy's friend in exchange for helping her screw Lucy, and the hope was there that we might get Lucy herself. Instead, we're denied Lucy because once again, Bobby cums prematurely, once again showing how pathetic he is in a game that's supposed to be about him becoming dominant. As you mentioned, there was an awful lot of work to get there, but you saw the result as a reward. I saw it as a punishment. There could have been a scene where Bobby is given the choice to actually penetrate Lucy in the hole of his choice, but with the knowledge that he'd get in trouble. Then let it happen and show it, and have it end with the police arresting Bobby, or Lucy's friend saving her by hitting Bobby with a lamp after he cums, or something for the bad ending. Instead, we aren't given any option except automatic failure.
To make matters worse, Lucy's friend Julia said she was lying about sleeping with Bobby, so that doesn't happen. It could have. It should have. It would have taken so little work for Rainces to add it to the game as a consolation prize for not at least fucking Lucy's ass. Instead, he just intentionally blue-balled everyone again, for no good reason other then Rainces apparently doesn't want Bobby having any sex in the game, or most people to be able to get off while playing it.