[sc_rufctr]

I could tell multiple stories about the idiots I've encountered on the road over the years and yes I've made mistakes out there.

There's only one way to avoid most of them. Drive defensively and at the speed limit. If you want to be less frustrated? Lower your expectations. For instance Taxi drivers often take silly risks to save time so if you keep that in mind you wont feel frustrated or angry when they cut in front of you.

Dash Cams are a good idea. I've been using one for about 7 years. (I'm on my second camera)

James May said something long ago... "Why would they let someone drive a car if they didn't want to be good at it?" (or something like that)
That may sound like a simplistic statement but there's a lot of wisdom in those words.