I'm a great driver. I make a mistake maybe once a year (and I apologize for it by waving my hand). Whereas every day on my commute to work, I see a bad driver doing something dangerous. Guess what, I drive by more than 365 cars on my commute, so my stats are actually no better than everyone else. But it feels like it.
That you know of. How many mistakes do you suppose you make that you aren't aware of? Or maybe not even a real mistake, but a perceived "mistake" as seen by the other driver?
I suspect the latter happens far more often than real mistakes, due to information asymmetry - I know exactly what I am doing and intend to do, while I can only guess and infer what you're doing, beyond the very meager data provided by brake lights and turn signals. If your real behavior differs from my expectation, I call you a bad driver who made a mistake, while you really did nothing wrong.
And no shade intended by that. We might all have made an error like this.