5/10 Bellagio Bottom Set

[gomerpyledc]

Hero is UTG+1 ~900, CO ~800 and Button ~1000, CO has pulled some plays before but is overall solid, Button just came from the must move so no reads yet.
Hero limps with 22, 3 limpers, Button raises to 50, all call. 5 to the flop.
Flop 10-3-2. I check, CO bets 200, Button raises to 400...hero folds.

I think I played this terribly, but my gut told me that I thought I was beat here and that with 3 other limp-flat callers I might be running into the nastiness. I know its very weak, but can anyone justify it?