I hate my life. My family despises me,I'm constantly bullied in school and have chronic mental illness..?

I'm miserable, so why don't I just kill myself now? Is there actually any point in suffering through life? In fact how different would the world be if everyone took a gun to their head and shot themselves now? In my opinion it'd be a better place because all humans are ignorant, obnoxious, self-righteous, sadistic, hypocrites. There is no meaning to life it's just one big random mistake. I'm all out of reasons to continue to live and I'm wondering if anyone can actually come up with one decent one. Don't bother telling me that life will get better because if I'm 17 and it's this **** already I can only imagine how bad it'll be in 10+ years time.