A big part of your frustration comes from not having the right expectations.
Why do you get mad when driving?
Did you really expect nothing unexpected to happen in traffic? Did you expect nobody to cut you off? Did you expect there are no traffic jams in LA?
I don't think so. Not really.
Rationally we understand that “negative” things like that are a part of the experience.
And yet, we act surprised when something like that happens.
And decide to react, get mad.
To avoid this, you need to set the right expectations. You need the right value-judgments.
Whenever you start a journey - no matter if a physical one with a car or any other kind of journey towards a goal, expect things to go wrong. Because they will.
You will be in a much better position to deal with the hiccups when you’re mentally prepared for it.
Have a safe journey.