This is suspicious behavior, though. Both accounts are playing from the same country and were created on the same day. Chances are that this player was using two accounts.
They are both in 2 RT games rn, with the lvl 8 in 1 MD game, and the lvl 36 is in 3 MD games. They might just be 2 friends, but the lvl 36 wins a whole lot more,
I wanted to report this but would rather seek opinion and teh report button does not offer the possibility to report this but refers to a wiki page.
Given the suspicious circumstances, you could report this under the Other category. That way a moderator could check if both accounts are controlled by the same players (you only need to report one of them, not both)
I do not agree with the opinion of collusion. Two working against one without others knowing at the cost of one of those players is cheating.
Collusion is and will be an essential part of FFA's. If you do not like it, I highly recommend you stick to 1v1, 2v2 and 3v3 games, and only play games with people you trust.