Very bad losing streak, dont know what to do :(

I was playing my promo to Gold III when this started. I know it is hard to believe as I did not believe when people talked about this, but I am getting the unluckiest losing streak ever with bad teams, trolls, afks in every game, and I don't know what to do. Yesterday I was even demoted to silver :/ I have lost something like 21 of my last 23 matches, and I am playing decently well! I know it sounds like bs but I AM! At least well enough to have more wins than this!!! What to do !? I feel discouraged to play the game anymore
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