In my own experience, some of them were unbelievably catty, kind of go out of their way to let you know you are unwanted. Even if I'm at a point now where I'm eligible enough to date, I wouldn't want to be stuck with those types of women. So yeah, I understand how MGTOW and incel feel but I can't really call myself bitter as they are

Not just them, they'll go out of there way to broadcast your undesirability so that nothing is mistaken. I still remember one poor idiot when I was a freshmen in high school, poured his heart out into some puppy-love fueled letter which proceeded to be mocked and belittled by our entire science class when it was passed around, even the teacher.