Okay. Fine. Then look at it this way:
You have less odds of having the troll than the enemy team does, assuming you're not a troll or a professional streamer. So the fact that there are trolls becomes completely fucking irrelevant to your chances of winning once you get to anything remotely resembling a large scale.
How do you deal with trolls in your games? Report them and move on. Stop fucking wasting your life going "I'M HARDSTUCK BECAUSE OF TROLLS!!!!!!!!!!!!!!!!!11" and keep fucking playing the game and trying to improve.
If you obsess over the trolls you get, or over your team feeding, you're failing to improve. If you're focusing on how your team lost the match because of a poor Baron call, you're not becoming better.
Even if it's 100% accurate that you lost the match because of a troll, and it was physically impossible to win the match, you need to be focusing on what you did wrong.
Fix your mentality and become better at the game. That's how OP fixes his problem. 90% of the "feeders" he's seeing are people who lose lane slightly and he fails to help.
Yes, there are trolls. It happens, and it sucks when it does. But trolls do not prevent you from climbing, because you are not popular enough to be targeted and you have lower odds of having a troll on your team than on the enemy team.
OP asked what to do. I answered.