2v2 random in fluffy league

[Juslas]

Thats correct: you need to get "waiting for player" text for your teammate slot.
Then yell for skillful random players where ever you can.
But there is no telling how close your hidden ranking is ...
When your rank is at absolute top, matchmaking finds no one to play against you (quite often), therefore number ones do get matched against newbies (or just about who ever was there).
It has been elobarated before - having a match is prioritized against waiting indefinitely to have better matched one. Also random against arranged was choice - to have matches in a first place.