This. Go into the "Wild" playlist and make a stupid deck that everyone used to hate. Find a theme and just roll with it. Make a challenge to yourself. Like a taunt only deck, or only cards that have effects using RNG. I gave up on sweaty gameplay years ago when I realized that no matter how much I play or how much money I throw at the screen, I'll never be one of those Hearthstone "pros." And that's cool with me. I just play for fun and hope for some stupid awesome RNG scenarios to play themselves out.Build silly decks. Sit down and ask yourself "What can I do to make this silly and fun?"
For instance, a while back, I was using my C'Thun Druid. I threw down Brann and copied him with a Faceless Manipulator. Next turn, dropped a 22/22 C'Thun, triggering battlecry 3 times spreading 66 damage out on the board. Just dumb fun. It doesn't always have to be about winning. Believe me, I've lost a lot.