pacific.heights - hands up to you for saying 'balls out' how you feel.
I am not cabin crew but I have been involved in the past. So I am aware that it is a damned hard job.
As regards a career change - I think you should do something in which you can voice your opinions - you did it very articulatley.
Everybody talks about IT these days. Maybe that is an option ?
I think a trainer in something which you have a passion for would be appropriate.
Just my tuppence worth and I wish you the best.