You talk about a "new kind stupid" while displaying a new kind ignorant.
I'm happy to shed some light on this for you. The "hate" mostly comes as a consequence of the game not being advertised as cuck fan service while actually being basically cuck fan service.
Take the previous T4bbo game as an example. It had NTR routes but it never made it the game's focus. This one on the other hand basically makes it the game's focus despite not originally starting that way. Somewhere along the line, the developer found a niche of cuck supporters with deep pockets and the game kind of veered that way.
I know English isn't one of your strenghts but I hope you managed to understand