Have horror movies gone downhill? To an extent at least?

Yes, I've looked over my list of favorite horror movies and concluded that they stopped being good in the 90's (Black Swan was great, but not really a horror). What happened to movies like Rosemary's Baby and Pet Sematary? The horrors today not only lack a decent plot but also they aren't scary, just bloody and bombtastic. And worse yet, they lack sympathetic characters. No one to sympathize with, no scare. Some are good, obviously, but they aren't made the same anymore. Hollywood is trying to appeal to teenagers with lots of cursing and gore, rather than to just anyone (I'm 15 and I like the clics better) They're really losing the fact that if they're going to make a profit, they should at least make it worthwhile.