good tournament players will almost always exit the tournament on a bad beat hand or a cooler.
the reason is, good players rarely get their chips in bad, and when you get your chips in the middle with a better hand than your opponent, you've done your job.
but that's no guarantee of anything. If you get all in preflop with Aces against your opponent who has Kings, you are an 81% favorite to win the hand... but that means 1 time out of every 5 times this situation happens, you will lose. 4 times you'll win but the one time you lose is the one you'll remember, because it's likely in a spot where you get knocked out of the tournament. Or a hand like 66 which you flopped a set and got all in again somebody with a QQ overpair to the board... and the river comes the Q to knock you out. This stuff happens, over and over again. It's the nature of a tournament player's life. LOL
We're looking for those rare few occasions when these hands DON'T happen to us. Maybe you get more aggressive and steal more blinds, which means you have a bigger stack to absorb these crushing beats. That's one way to try and overcome it. But it's gonna happen, and the biggest help a poker player can give themselves is the ability to laugh it off and shrug it off, even when it keeps happening over and over. Hopefully you DO win a tournament every so often, because that little bit of success is enough to carry us all thru the dark days when we can't seem to win anything. The phrase I always use is almost a religious one - "Keep the faith". Mindset is important in this game, if you let it crush your soul, it will... so don't let it!!