I have one more game to play to get my rank. If I don't play it and wait until next season will my MMR "reset" or will I still be playing around the same elo I was playing with to determine my rank?

One thing that I noticed about people in this game - they tend to backseat game. Whenever there is a clutch situation - they need to open their mouth and tell me what skills I have, what they think about situation, that I still have my legs...