First, I apologize for the click-bait title. Because "cheating" actually requires intent to break rules, I cheated picking a topic title.
Second, what I'm actually asking is, "Do you screw up in X-Wing? A lot?" Because I do.
My top screw-up is forgetting what I dialed in. This happens when I'm vacillating between two or three moves. I decide on one, set my dial, but by the time I activate my ship I think I've done another one. It doesn't help that I also absentmindedly forget to flip my dial until after I've moved. It got so bad at one point that my frequent opponent (Dan, from the defunct TSG) started openly ridiculing me for it. (Which I deserved.) "Are you sure you didn't 4K off the board?"
Lately, with 2E, my most common screw-up is just plain getting the rules wrong. In my most recent tournament, on three separate occasions I was positive I was right about something (my own Boba Fett with Qi'ra does not benefit from Trick Shot (wrong), Coordinate requires you to pick a ship to give an action and then measure (wrong), and the person being jammed chooses whether to lose a Lock or a green token (wrong)), and on all three, I was just plain wrong. (The only one we didn't check, thankfully, was the one that worked against me.)
I'm also a little clumsy in a ship-scrum, and bump ships and obstacles frequently, but that's a different thing, and since I let my opponent have final say on corrected positioning, it doesn't make me feel so bad. (Basically, being dumb makes me feel worse than being clumsy.)
So ... do you "cheat"?