I guess from the stack sizes and your initial raise that you are playing NL20 FR.
You raised from the CO with AKos (you therefore have a fairly wide range in the eyes of the sb and bb) - the sb 3 bets, which depending on the player he could do with a slightly narower range but certainly one which includes AK, AQ, perhaps AJ and probably 88+, and you then flat call the 3 bet (depending on reads/stats you could have 4 bet)
You flop TPTK on a rainbow board with no obvious draws. The sb c-bets and you fold?? I would probably raise here to see where I am - he could have QQ, JJ, 1010 or even air (AQ, AJ are just 2 options).
If you hit the A would you have called or raised or perhaps folded as you were probably behind to his set of As?
There are only 4 probable hands that you are behind to - unless you think this player who only played 15/150 hands could have 3-bet you with a hand that flopped 2 pair?
Personally I think that if you planned to fold to a c-bet on a flop like that you should have folded pre-flop. When you called his 3-bet pre-flop what was your plan for the hand? Did you plan to fold unless you hit 2 pair or trips? Forming a plan for the post flop playing of a hand is important and takes practice.
Sorry if the above sounds harsh but I think the fold was weak as there are too few hands in his range that are beating you, and you are ahead here far too often.
This is of course just IMHO and could be completely wrong!
I just put the hand into the equilator and against a 10% range you have 83.8% equity in the hand - you will win 80%+ of the time - seems pretty good to me. If we reduce his range to 5% of hands (77+ AJs+ AKo) you still have 73% equity!
