I agree with your sentiment and I bought the game to support the devs and to encourage them.
There isn't a game quite like SoD, where even though there are better FPS games, better visual novels, better zombie games, better base building games, better customization, none have combined them as well as SoD.
And also there just isn't a lot of H games that do both H and gameplay good enough.
That might be why I like this game.
I expect that players will continue to be lenient to Team Krama as long as this niche doesn't have a viable competition.
The jank is common among Japanese indie devs though.