While I agree that story is too fast and could use a rewrite, I still think calling the game garbage is insulting to the devs time and effort he put into this. It's a first release and can easiliy be remade.
Regarding the NTR + incest tags, they are a great combo. There were alot fo games that had incest + NTR and were quite successful (EX: The Tyrant). The fact that you say the game is ruined solely by adding NTR seems that you're just biased against NTR, calling it trash and crying about it despite alot of people liking it.
I really enjoyed the game and can't wait for further development. I really hope we get to see more NTR since it was only mentioned in the game and we don't really see any familiy mambers with other people. Also the dev should add more stories (obviously) and possibly make them intertwine (EX: MC from one family fucking the mom of MC from other family)
Lastly, since it's a first release and the game has a story that every adult male is dead, the dev can intoduce futa charaters that go well with NTR, but I understand that some people are against it.
With that said, I will keep this on my watch list and good luck dev.
Sry for the long post, I don't have a potato to give.