Do some people stay in Bronze forever?..

I play this game since August 2017 with a few months break in between. I can't seem to get out of bronze. I was silver 5 for a short time, then dropped back. Some people may not agree, but the amount of afk'ers and trollers in bronze are insane. I often play with people who are bronze 5, 0 LP. That means they hit rock bottom and have nothing to lose. So they troll. I really, really want to get out of Bronze but I don't know how.
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