The same thing happens to me. I think it is one of the big hurdles when jumping from intermediate to an advance player. When you play someone that you feel is less challenging, we tend to do the following:
- Lose Focus
- Take shots for granted
- Take your opponent for granted
- Lose interest in the match
Why??? Because you feel like your certain get another chance at the table. When you play a better opponent on the other hand; you know if you miss, it means you will likely loss. So you focus a lot more.
For me, I know I need to work on my focus and discipline. I almost lost the first round of a small tourney last night b/c I was un-impressed by my opponents game. <---- This should never happen. Once I overcome this, then maybe I'll be a more consistent player.