re: Poker & How badly did I play?
First of all CO is a fish, because he insults you and act like a "poker teacher" at the table. This is bad etiquette and also bad for business, if he is trying to win. But that being said against a 4BB open and with 20-25BB effective I dont think, I would ever call from SB with any hand. Either its good enough to move all in and get some fold equity, or you can just dump it. And Q7s is just a fold. You are not doing well against COs range, and you are also going to be out of position postflop with a hand, which offer a lot of reverse implied odds.
This time you flopped two pair, which is of course great. But what if the board is Q93, Q83 or Q63? Then you flop a top pair, which is really difficult to get away from with stacks this short, but you are still behind to his AA, KK, AQ, KQ, QJ, QT, Q9 or Q8. Or you hit on a board like K73, and now you end up paying off his AA, AK, KQ, KJ etc. So in general you want to aviod these hands, that have only one high card and nothing going for them apart from the fact, they are suited.
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