You used a tool without researching it first, you jumped a bandwagon without finding out its destination, you most likely used it wrong because you didn't RTFM. Now you ditch and diss it. Grow up.
Fair enough, perhaps a bit harsh. But from that to call an entire system a Troll... It works for some, it doesn't for others. Usually its down to use case and knowledge of how things work. For me mongoDB was a perfect fix as a datastore along side a tranditional Postgres instance.