Still Aang was clearly one of the most skilled characters in the show

Zaheer only had air bending powers for a few weeks and could already take out multiple enemies

Aangs grand kids are only children and they can stop full grown solders

A few air benders can destroy a small town with a tornado if they felt like it.

Air bending is OP as fuck

Once again proof that airbending is the most powerful of the four. Remember that scene with gyatso's body surrounded with comet charged firebenders? And let's not forget korra kicking the wind out of Amon.