This sounds more like a "learning poker" thread.
I don't know the hand Hillbilly is referring to but, all premium hands lose winning percentages the more other hands there are that stay in. That's part of the reason to raise preflop and have less players in on the flop and later. So, we're talking 2.5 - 4 big blinds, PLUS, one more for each limper, so if there's 2 limpers already in, raise 4.5 - 6.
On the flop it depends on the flop cards and the number of opponents.
At the same time, AQ and AK should be staying in against your KK in most situations since those are premium hands as well. In most cases you're going to win. But by the same token, sometimes you will lose 2, 3, 4 times in a row to them. That's just variance.