First of all, "too aggressively and he hit his flush" is backwards thinking. The mistake is made by playing slowly so that villian has correct odds to chase his flush. in your example, he makes the mistake but gets lucky.

Another point. 222 is probably the safest of all trips because the villian would have had to call preflop with absolute garbage to make a full house (in this case for example, 72, Q2 or J2). Even the most donkish players usually don't play a deuce unless it comes with an ace or another deuce.

In fact trip deuces may be the only trips I will slowplay if my opponent isn't the big blind (where he could have the above holdings) and if it is a rainbow flop.

Again, I think you played this very well.