o man, if you are tilting already poker might not be the choice, btw listen, the guy with a set of 6's firt off all was probably betting hoping you only have a draw to a flush, he was trying to push you out, plus, if you do already have a flush, 1 out of 3 times he will win by catching quads of making a full house, so the bad beat is not that bad actualy.
and with the guy who had a A high flush and you had a K high flush, ware there 4 cards to a flush on the table? if so you might want to check it down next time, if there ware only 3 cards to a flush and both of you had a flush, well it happens.
i say you keep playing abc poker at these stakes, when poker gets the best of you take a break, and try again later, thats what i do. yesterday i lost 5$, today i crushed them for 35$ and 2nl.