That's a pretty tight fold. Villain could be holding 88/99, a straight flush draw, 67, maybe even 78. You're only losing to 2 hands, and you're winning against a whole bunch of others. Besides, 66 and 77 probably smooth call you more than half the time here. If you can fold 22 when you flop a set this easily, you shouldn't be playing them in the first place.

Easy push.