Although I'm not sure I agree with the reasoning of players being awful, I'll echo the sentiments that you should move up, which is saying something for me because I'm usually advocating players stay put or move down

Because you seem so results oriented, as a consequence I think it's possible you are reluctant to move up out of fear of losing the money you've built up. Jump up to $5NL and be prepared for the fact that you will lose 1, 2, or maybe even 10 buy-ins. If the thought of losing 10 buy-ins scares you, then you really have to think about your mental toughness and improving it. One of the many facts of poker is you WILL lose money. The point of following bankroll management is so that you can correctly handle it. At this point, if you lost 10 buy-ins @ $5NL, you'd be @ $137, which is STILL enough to keep playing $5NL. I wouldn't drop back down to $2NL until your roll hit $100 or 20 buy-ins.

As long as you're playing solid poker and making solid decisions, let the money take care of itself. Just make sure you're not risking more than 10% of your roll on the table and that you're not losing more than 5% in any one day.

Good luck.