I totally know what you mean and I was literally in the same spot just a while back, but just looking through Op.gg for a second...
You do pretty good, but your playing champions that are semi difficult to play, like
(kinda
) etc.
Your best win ratio's are with
and 
Try to stick to champs, (while in bronze) that you can do well, that you have fun with, that don't require more than 10 seconds to get down the mechanics, and that are viable in the current meta.
and I know what it feels like to have troll jerks ruining your matches.
My advice would be to find people to party up with, it makes matches more enjoyable, and its helps you get up in the ranks. THere is just less pressure on you to completely carry a team of trolls.
Keep practicing you'll make it out! I'm still in bronze, one more series match and i'm out haha :D
[slayer-jinx-wink]
PS you'll probably get people tryin to flame you from your post... just... pepper your angus.... haha