I am trying to get back into the game, and the toxic behavior is really killing it

This month I've been trying to get back into league, and I decided to log in and play some games last week, it went well. I then log in today and see my quests and it says play ranked solo matches. Now I don't know much about that but, it offered bonus exp so I decided to try.

Every match people have been screaming at me, telling the enemy team to report me, just a non-stop torrent of screams. All because I want my bonus exp.

I know I'm not good at this game, I try my best, but I still fail. Don't I have a right to play ranked? I am in my non-ranked matches, my placement matches shouldn't I get a right to play them until I get put in my rank I'm suppose to?

I play support Elise, she is my favorite champ for support and apparently this isn't correct?

By the Gods I am so sorry, I am rambling and very distraught I don't want to lose my account just because I wanted to try ranked. Please, what do I do? I'm not good enough for the "placement" ranked matches!