Ranked still sucks, even with Positivity.

So, I just lost a game because a player didn't know what kappa signifies. Basically, someone on our team called him retarded, and followed with a kappa. Then, the he said "you wanna see whats retarded" or something and gave first blood to a .

So I ask, how does the flex system work? I went 5/5 in my placements and played normally, but I got placed in Bronze 5, even though I was playing better than a Bronze 2 level. Then, these two ended up feeding, and they told me that they were Bronze 2 and Bronze 1, so I ask, WTF? I wanna play ranked, but I don't wanna climb with these things..

Gimme your thoughts and opinions, since they are the only way I socially interact with people, assuming that doesn't visit the boards.