I came in to post this. I'd be surprised that most people are putting the blame solely on Brunson for that fight sucking if I didn't already know how fucking stupid MMA fans are.
Brunson threw way more strikes than Leben. He also advanced position multiple times when he took Leben down and landed hard shots on him on the ground. Leben did nothing but lunge at him a few times. Also, keep in mind that Brunson took the fight on eight days notice when he hadn't been training and was out of shape.
Dana and most of the idiots who are abusing Brunson online are mad because they wanted Brunson go out there and stick chin in the air for Leben to hit. IMO Leben's getting a huge pass for having a laughable performance against an inexperienced, out of shape, one-dimensional fighter who was brought specifically to make him look good.