It's just a hand. And you won it. No different than if you raised from UTG and everyone folds. It's just poker. A win is a win, mate.
Stop getting upset at outcomes and focus on the process, the decisions...the plays.
Basically, if poker makes you upset, you have the wrong attitude and probably shouldn't be playing poker.
You should instantly forget all the hands you fold. (note: you will however, be reviewing the hands later...so not totally forgotten).
Do not put yourself through the agony of "Oh, I folded Top Pair/Two Pair/Trips/Straight/Flush/Boat". You folded because it was the correct play given your stack size, range, position, stage of tourney, intel on opponent, etc. The only decision you cannot make, is that one which picks the next cards to fall. We're playing the
odds...yet often enough, we see odds-defying run outs. That doesn't mean you should have called. It means that you did the right thing, yet an outlier fell on the table.
Me, personally, I love it everytime someone folds. You CANNOT LOSE when everyone has folded. That is winning poker right there baby.
Also -- when you've reviewed as many hands as I have, you realise that AA / KK can lose you a LOT of chips if you don't play them correctly given your table tendencies. Overvaluing these strong starter hands can be lethal.
Cheers,
JT