The more
poker hands you play, the less emotions affect you.
It's a simple equation really. A linear relationship. It's kind of like a maturity thing. Younger people are quite emotional, but older people have "seen it all" and don't have such extreme reactions anymore. It's the same in poker. Newer players react very strongly, but veteran poker players really don't.
Once you've played millions of poker hands and thousands of tournaments, tilt literally just goes away. It has for me. I never tilt anymore and I used to have a problem with it back when I was just learning the game.
You know what the problem is? YOUR EXPECTATIONS. When you pick up AA, you expect to win, understand? And when you don't win, you literally feel like you got cheated, or got "shafted" or whatever phrase you prefer... but it's just one poker hand in a lifetime of poker hands, you see? It is meaningless in the overall scheme of things. If you've only played 500 hands of poker in your life, you will always feel these negative emotions over the "bad beats" and the "coolers", such as when you pick up KK and get called by AA and lose... unfortunate, unlucky, yes certainly... but it's still just one hand. By the time you have played 5 million hands of poker, you will have seen this happen over and over and over again. But here's the key - if you are a solid player, you will also see it happen over and over and over again IN YOUR FAVOR. Over our lifetime, the "luck factor" eventually approaches zero... meaning, the bad luck and the good luck cancels each other out!!! And what are we left with? Only the relative skill level between the players to separate us.
So my advice is to play poker hands until you have blisters on your fingers from the cards and the chips, or from clicking the mouse button.

Trust me on this (I have played millions of poker hands over the past 15 years)... it eventually goes away. You eventually LOSE your expectations regarding the outcome. You will eventually just "take it all in stride", you won't punch walls or scream and yell and get upset or angry or sad... and at this point... you will finally have made it. You will finally be a "good poker player", and just work on improving your skills to become the best poker player you can possibly be. There's really no "magic short cut" to this process... just keep the faith that it will eventually get better and you won't react so emotionally to the negatives at that point.
Don't let expectations drag you down. STOP EXPECTING TO WIN. Just play as good as you can play, and keep learning the game along the way. You CAN do it and you WILL do it... if you truly understand my words. I hope they help someone. Best wishes!