Why all the hate?

I’m a Sophmore going through rush this year and I’ve seen a lot of people talking negatively ab houses like Alpha Phi. From all the girls I’ve meet briefly they were all extremely nice and normal and not like what I’ve seen on here. Is there a reason they get so much hate? Is it true or just other people trying to bring them down? I’ve personally never heard of anything bad a them from people irl only online… Help