It’s the animations for me. I know it sounds crazy but I am a little bit angry every time I notice an action that is measurably slower than it needs to be because some “UX designer” (should not even be a job based on the BS I’ve seen) needed to justify his salary by blocking the UI process with a whiz-bang animation. Especially an action I have to do many times in a row, or all day long. I wish I could set the iOS global animation time to 0 like you could do back when you could jailbreak. (And no, reduce motion doesn’t help, it just replaces them with crossfades but still wastes the same amount of time)