Yeah. I play less than 20% as well.

With poker you're not guaranteed to get good hands. Actually at any time the odds are in favor of your next hand being complete crap.

If you think you're getting bad cards, then figure out what the odds are of getting a good hand. Then try keeping notes. I'm sure you'll find that you're getting pretty much the hands you should expect over time.

For instance if you think TT+, AJ+ and KQ are good hands, then on average you should get 1 good hand in 14 hands. That means you should play 7 hands out of 100. That's way less than the 20% you play now.