YBF got popular and others wanted to ride that "Yandere Boy is insane and loves you game" stuff.
A start screen looking similar is also a bit of a funny thing to use as a way to compare it because trust me no one cares and you can also have the same start screen because you bought it from someone. If you played a lot of visual novels you will see similarities because again you can buy that from someone. And no one would play it more or less if a start screen looks similar lol
Again you don't really know much yandere content just go to the tag yandere. YBF is popular but they didn't create that trope lol there were many before that and during that time lol.
No idea is original nowadays and again if you actually play quite a few it's the same pattern.
Critic is one thing but again "I also think you got downvoted because you called it a ripoff and clout chasing and that can come off as rude regardless if you didn't meant it that way or said it "feels" doesn't change the fact that you called it that way."
Like you said your review was kinda lazy and accusatory.
Again just an observation intent doesn't equal output.
You don't need to justify whatever to me or get defensive i just gave you a reason why some people disliked you.
Anyways have a good one won't continue the convo further