Riot Sucks at placing ranks.

So. I just won my series. Casual wins. 7-3. Casual scores. 24/6 or something. Right when I finish my game. I get fucking. Bronze. 2. I won 7 Games. Out of 10. And i got bronze 2. What the actual crap Riot. I won SEVEN GAMES. OUT OF TEN. 7/10. SEVEN/TEN. And I get BRONZE FUCKING 2. Riot honestly is always disappointing me every single season. I won 7/10 games. And get bronze 2. I won 5/10 last season and got Bronze 4/5. What the fuck. My brother won like 3 or 4 this season and got Silver 3. And last season he won 4 and got Bronze 1. What the fuck is wrong with ur system of placing. Is it like Good KDA, Good wins, good whatever, Bronze. And Bad KDA, Bad wins, bad whatever, Challenger? Well it seems like it. I even won fucking all 10 games and still got bronze 3. What the FUCK. Riot Please. Be better than this.[slayer-jinx-unamused] And I am like so fucking close to going to DotA. In conclusion. It doesn't matter how many games you win. Because obviously Riot doesn't care. You could lose all 10 games and get Diamond. Or win all games and get bronze. Either way. Riot sucks.