This sounds like an old complaint, but it’s something new:
When you “Quick Join” as level10 or higher player, you are placed in an empty server alone.
The old complaints had the same content, but it happened for a reason. If it happened, you could compare in the server browser that either all min10 servers with players were full, so you were expected to start up a new one, or there were none running.
What is new about this bug is, that the half-full (6/14 players on the min10 server playing in my case) servers are not filled up anymore with min10 players. You are placed alone in an empty server, but in the server browser you clearly see that half full min10 server running.
If you join there manually, you can see clearly that it’s not being filled up by matchmaking.
The RedEye-patch broke something about min10 matchmaking.
(this seems to apply to objective mode only, the stopwatch quick join just placed me in a low-level server)