This. Just mute people if they start talking negatively. Works every time.
Also, you said you just got level 30? TO be honest, you should try playing draft normals for a bit. Ranked is nothing like blind normals. When I started ranked I jumped straight into ranked, got bronze 3, and lost most of my games.
Play draft normals, find a few champions who you really enjoy to play, and learn how to win with that champ. By the time you get comfortable enough, and then try ranked again, I guarantee you WILL carry the game, and win most of the subsequent games and get to silver.
Also, draft normals are much better for learning and improving because you get matched with players of all skill ranges; not 9 other bronze players. You will have silver, gold, plat, diamonds in the match sometimes. Draft norms are usually much less toxic as well
so you actually can learn instead of being wished death or OMG REPORT NUB TEAM GG FEED.
TL,DR; norms > ranked, until you have a few champs in a few different roles that you can carry.
BTW, don't listen to anyone who says support can't carry. Trust me, they can
PM me if you ever want to play together.