So I just played a bunch of maches (turf war) and I almost only got paired with sub level 10 players.

Is it just a strange coincidence, am I just that bad or has there been a sudden jump in new players?

Which level are the people you get paired up with usually? I'm level 15 now (started last week) and I've seen a lot of level 1-15. It thought it was because the game paires you up with people that are roughly the same level as you.

Usually level 20 and above (am lvl 29 myself currently)

^It might just be that people don't play it that often. I've had it since launch and i'm level 18 with 25 hours+ of gameplay. 

It's just not that addictive of a game imho

I never really play turf wars after qualifying for ranked and have never had trouble finding matches in my rank.

I always warm up with a couple of turf war matches before jumping to ranked matches :)