Best example of garbage “balancing” I have is in Divinity Original Sin. I was playing through the game and building my main character to be a badass fire mage, complete with enough gear (which was quickly getting overleveled, putting me at a bit of a disadvantage) to have over 100% fire resistance so she could stand in lava and molten ground while dishing out damage. It was a build that took most of my gear slots to achieve, and was what my character was entirely built around.
Then they patched the game to stop players from being capable of hitting 100% resistance, even. So my entire build was FUBAR and didn’t work anymore, with 75% of my skills being unusable because they were massive AoE that would now nuke my character. They literally broke the game for me, and I never finished the game because I’d have to restart to have any fun with it again. That’s absolute trash, and I loathe and despise developers that do ■■■■ like that in a non-competitive game.
It’s really a stupid process to be nerfing the hell out of things in a singleplayer/coop game that’s not outright game-breaking. Players like having the power-fantasy of eventually steamrolling things they had trouble with before, it’s not like that’s a secret. If something is super strong then maybe they should add modifiers to new difficulty modes instead of nerfing things that are fun and badass. And not calling a nerf a nerf is pretty ignorant. It’s a balancing patch for the game, yes, but that doesn’t mean it’s not a massive nerf for the sake of nerfing.