Yes coolers will happen. But if you play a million hands, you will be the player with KK, when someone else have QQ, more or less as often as you are the player with QQ, when someone else have KK. So stop worrying about it and focus on hands, that matter
Hate when this happens but it will every so often. Just shake it off. After a while it will be less frustrating and just an annoyance. Hell last nigh I flopped 2nd set on the money bubble. Got it in bad and the other guy had top set. I was not happy missing the cash but laughed. That's just poker.
I get the urge to post a bad beat, but it's just unnecesary and futile. You play the odds, if you did what every poker pro would do, it sucks for a bit but move on with no other thought on it, it's just what it is. I was the one with kings in an important situation vs queens, he made a flush and that was that, who cares.