WTF, chess.com???


You'd be better off to see puzzle rating as what it is: an algorithm to match you with appropriately difficult puzzles. It's not a high score.

There was added a superb option to select the difficulty of puzzles you get, try it if you have not yet
If you tried it but you still get low-rated puzzles then who knows how...

Where is it??
It is either in the right bottom corner of a page with a puzzle or in Settings > Gameplay > Puzzles
Oh, and it is currently available in the web version only, not the app