Engine and lag prediction go from bad to worse with each update. And dont forget about lobby bugs and the fun matchmaking system.

Primary acc, Prime MM:
Play with retarded mates and sometimes griefers (almost guaranteed if you didnt queue as full team!) against laggers and hackers.

Secondary acc, Non-Prime MM:
Play with a nice team, even when solo queueing, against more or less equal opponents.

Congratulations Valve. Lets just throw a few new skins at the market so no one notices the ♥♥♥♥♥♥ up system.

Edit: Apparently prime-MM-lobbies could also have been matched with non-prime lobbies as i found out although "only prime" selected for GabeN reasons. the new trust system seems better.