I looked up your review. Personally I think you are overreacting.
1) Saves almost always don't work. That isn't new. It sucks but it's not new and you shouldn't be shocked about it.
2) Lack of incest this patch. Well it is about Eve, of course not. Spoiler alert neither will next patch will be about the main story line then patch after that is Rhonda.
3) Here I understand your opinion about stretching the game out. If you only cared about incest, then you see DC adding Roxxy and Eve content as padding and stretching. You may only want main story and incest, but personally I am SOOO BORED with incest in every game over the years, so the Roxxy and Eve content are great and are making the game better for me. Do I want more main story? Yes but then again we will get that next patch which will probably be in 3 months.
4) About the lack of an ending... I think you are making assumptions from DC. He may or may not have the ending in sight. Just because he is writing emotional stories for side characters doesn't mean he does or doesn't have an ending in mind. If you are saying he should write an ending of the story before writing side characters, I think that is a legit opinion.
5) LOL DC is not going to abandon this game. Making games makes him money. If he is messed up he will write less and less content per update, but why give up completely? Best case scenario he writes an ending and makes a new game. If he abandons the game he will lose all street credibility and his next game will tank. It may take a while but this ride will end.