I will not become angry over things I cannot control.

A cancelled train produces a very pure kind of anger, because there is nobody to give it to. The man on the platform with the tablet didn't cancel it. The company is an abstraction. The feeling is real and has nowhere to be delivered.

Anger is information about what you care about, so it is not a fault to have it.

The sorting question is only about reach: is there something here you can put a hand on? Sometimes there is — a phone call, a refund form, leaving twenty minutes earlier next Thursday.

When there isn't, the anger has no job, and what is left is disappointment, which is heavier but at least behaves itself.