Many of us (most) have been playing for years. Playing that long does not keep you from making mistakes every now and again, and some are chronic.
What’s the mistake you make that you keep making, and driving yourself crazy?
For me it’s forgetting about the death grenade a suicide psycho drops after you kill 'em.
Many many times (again, today) I’ll be running around a mob scene , usually in Southpaw, kill a suicider, and of course run right over his last will and testament grenade, damaging myself or even going into FFYL.
I say it to myself every time don’t run across the grenade and forget 50% of the time. Irritating, I just won’t learn.