The reason is simple,you aren't.
http://na.op.gg/summoner/userName=Stranger+Ways+
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I went through your last few Ranked Flex games. **
Your last game you went against: 5 Silvers ( Had a Gold 4 and Gold 5 on YOUR team)
Game before that: 2 silvers and 2 unranked (Had a Gold 1 and Gold 4 on YOUR team )
Before that: 2 Bronze, 2 unranked and 1 Gold 5 that went 5-10-5 on Malzzzzz (You had a Gold 5 on YOUR team)
Before that: 3 bronze 1 silver 1 unranked
Before that: 1 silver 4 unranked
Before that: 3 unranked and 2 bronze (You had a Gold 5 on YOUR team)
Before that: 4 bronze and 1 gold 2. The team with the Gold 2 lost because he couldn't carry the heavy feeding bronzies
Before that: 1 bronze, 1 silver and 3 unranked
Before that: 2 bronze 1 silver 2 unranked
Before that: 2 bronze 2 silver 1 unranked
Before that: 2 Bronze 3 unranked
People need to stop saying "I can't get out of Bronze because I have to beat Plats and Diamonds" when it IS NOT TRUE. You are facing MOSTLY Bronze, Silver and Unranked, with the OCCASIONAL Gold on EITHER team. Also, don't say that a LOW GOLD on your team is a PLAT OR DIAMOND that is making it impossible for you to climb, it is simply **NOT TRUE.
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You DID have a Plat 3 in 1 NORMAL game and a Plat 2 in another NORMAL, but that does not affect your ability to climb Ranked.