Thinking the worst case scenario is due to anxiety because you are over-thinking of what the future is to bring. Anxiety= Thinking too much of the future. Flight responses too.

Now when it comes to getting angry and frustrated it normally has to do with the past. Like when people are walking slowly maybe there was a situation in the past that you needed to get somewhere and know you didn't make it on time. So you put a continuation of thought upon that. Anger= Thinking about the past. Fight responses normally.

Also to put it this way hurt is actually a present feeling and the feeling on the surface of anger. The more you build; which resentment the angrier you become.

The more you can work on not over-thinking it can help with anxiety.