Promos in flex XD

You all know the curse of promos in Solo Q. When you struggle to reach to a higher elo only to be trolled in your promos. Well this happens X10 in flex. Since it is pre season i dont really care about Solo Q and that is why i play flex. I have to say i just lost my 7th promos in 4 days to plat. Every time i get to promos i will have >2 people either trolling or being afk. I don't how to deal with this curse. PLease help
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