Just got demoted to plat V

Well, so first of all here it goes my op.gg http://na.op.gg/summoner/userName=mestrepipi

I once doubted that it was possible, but in fact it is. From my last 10 ranked games (around plat 4 +- 25 LP), I've got intentional trolls / afks / feeders ON MY TEAM at least 4 times (emphasizing on my last 3 losses, in which were due strictly to troll teammates (resulting on defeats thus resulting on my demotion)). While I have experienced that on the enemy team, maybe, 5 times IN THE TOTAL amount of ranked games I played.

I mean, like, really? demoted? Because I happen to have a kid on my team that chooses to run and die non stop, or to buy 5 tears on zed. I am so done with this, I am only playing to not decay elo. This game has been out there for so long and you still haven't came up with a solution for this kind of thing? Good thing I quit buying RP a while back, things like this encourage me to never buy it again.

Thoughts on the ranked system?