Unjust ranked demotions

Before my 7 previous ranked game i was 1-2 games away from my promos, and decided to try my luck the next day instead. When i came the next day i played and lost due to someone trolling on my team, i then thought it happens i can get back. I was not even angry or annoyed i was lukewarm and played another. Again the same thing happened, the team got trolled, so I left it for the day. I came back the next day and played a game and we won. I then proceeded to play another and found out that once again our team got trolled. The next game everyone on our team was behind so we didn't win that but that would cancel out my earlier win with 3 games of being trolled on the side. Then the next two game i played the team got trolled by the jungler and we couldn't come back. At that last game i got demoted into bronze 3 when i was almost bronze 1. Now i know match-making isn't easy but your repercussions for trolls and flamers don't mean anything to them and so they continue to do this. I find it unfair how i played excellent in all the games i got trolled and still get demoted at the end. Now i wasn't here for the tribunal when it was live but i wonder if that would make a difference. And if any of you are wondering Riot support led me here when i could only choose between general questions and feedback. The game is great its just tiring since no matter what role i play there is a troll and i can't stop them from making us lose. If i support my adc, he gets fed but top or jungle feeds and its over. If i play mid i can make a 4v5 happen by deleting one person but we still lose teamfights. Is there is no way to end this cycle? Please either make it so people who just get trolled don't keep queuing with trolls, when they could have the possibility to be very good. Or strengthen your report system so trolls, feeders and flamers will be more careful when doing this.

On a daily average if i play 10 games per day, just for example 7 out of 10 games have a troll and 6 out of 10 games are losses.