If you were happy with it, it would be absolutely fine to be asexual, to be aromantic or to be both. You could also be none and just not want to date, that is absolutely okay as well, as long as it is what you want. What you write doesn’t give the impression that you’re satisfied with your current situation though.
Furthermore, hating yourself is definitively unhealthy! You shouldn’t hate yourself; you should work on accepting and embracing who you are instead. I’d suggest getting yourself and your mental health back in order first.
_________________
“I can calculate the motion of heavenly bodies but not the madness of people.” - Isaac Newton