Okay, so right about now, I can really put my finger on what you need to work on for your next review. Your points have been revealed to be incredibly under-developed. The tell-tale sign is that a good review should not require a Q&A session in order to figure out where you're coming from. That was supposed to be the primary purpose of writing a review in the first place.
Yes, saying that it gets boring after a while, though half-baked when left just at that, is still more valid than penalizing it for no single-player, and far far more valid than saying it loses points because the people that play it are jerks.
I'm not much of a fan of multi-player online gaming, but I've always wanted to try Team Fortress 2, because it seems like it might be different, and might appeal to me. I want to read a review of TF2 and be able to figure out if the game is something I'd find worth the $20 to buy it. Your review, unfortunately, left me with far more questions than answers.