im so sorryI had one such (ranked) game, yet it was fun defending 2 vs 5: http://dotabuff.com/matches/621327053
By the way, I don't know why, but my MMR has been decreasing for the past weeks. I used to be ranked 2.5K-2.6K MMR, and now, I am more in the 2.3k-2.4K trench. The difference is huge.
pick Ursa and get out
oh god you tooMight also be the time at which you play. I'm at 2.5-2.6k and the change you describe happens after 8-9pm est. Usually I get competent teammates and after that time no one knows whats a ward.