I remember playing my first ever round of Command & Conquer 3 online. This was after everyone had already figured out the #1 trick to winning... except me.
I started playing the game as if I were facing a computer. Y'know, build some defenses, build some structures, have a couple guys out scouting.
After not even like 30 seconds of play, the enemy was knocking down my door with a giant army of tanks with a constant stream following right behind that army. At first I thought the guy was cheating. I actually quit the game and reported the guy. And then I started watching C&CTV, the online monthly web series with C&C-related stories including the top 5 best matches.
Upon watching said "best matches" I realized that the strategy behind winning that game was based entirely around building like 100 tiberium refineries early on in the game and then building 100 war factories to pump out thousands of tanks. It's extremely unfair since going against tanks and structures, the tanks' weapons succeed, and against infantry you can just run them over. The game was heavily unbalanced to say the least.