Appalling, terrible and disgraceful.
No, chopping someone's head off because they don't agree with your ideology would be appalling, terrible and disgraceful. The writing you quoted isn't any of those things.
The sentence is fine. To manage a problem is to diagnose it, decide what to do and take appropriate action. That may happen in a few seconds or over a longer period of time.
took corrective action then decided to continue to Adelaide
The omission of a comma between the words 'action' and 'then' - now that
is appalling. Where are the standards these days?