Absolutely Breaks My Brain The Celtics Are 2nd in the East

Watching this Celtics-Hornets game, and I just don't get it. They seem about 3 guys short. If Jaylen doesn't have a good game (like tonight), where does the offense come from? Scheirman and Queta? Pritchard has been their 3rd best player all season?

Even when the roster sucks on paper, they scrounge together a 41-20 record. I just don't get it. I give up.