One one hand, people create a self-handicap when they complain about Steemit, so if it were to fail, they could say "I told ya so." I'm sure others are envious of those doing well and dwell on the negative in an air of pride. Humans also have a really hard time thinking long-term, especially nowadays in the advent of on-demand, quick information. Some people struggle to see the bigger picture and get distracted by the volatile nature of cryptocurrency.
All that said, I've seen quite a few compliments of Steemit, though I must admit that I've only recently joined Steemit, so I don't have the best lay of the land yet.