Thats great stats, but we tend to have more games with low shooting percentages. For example, from your numbers: No. of games shooing <=33% Houston - 15 Golden State - 12 Cleveland - 10 San Antonio - 11 OKC - who cares
If you can be above .500 when you shoot below 33% from the 3 that's a good sign. Means you play good D.