platinum 5 is wat im ranked im on a 12 win streak and my rank has not gone up i have only played against diamonds and champs and i go positive the -Yoink-
You have yet to rank in any playlist this season. Not sure what you’re talking about.
Simplest answer is that your rank isn’t going up because you play at the level of your rank, and not better. And the system won’t let your rank go up unless you play better than the average person at your rank. You can discuss this more in the Matchmaking Feedback thread.