Hello.
I'm a guy from Illinois thinking about coming to Korea to teach English after my retirement next year.
A lot of the horror stories I'm reading has me a little worried.

I would like to get a better picture of both the 'good and the bad' in Korea.
Is it possible to avoid the pitfalls of capricious employers?
Is there a particular process or agency which would increase my chances of finding a dependable position? Or is it always a kind of roll of the dice???
I'm also a little worried about my age - 53. I wonder if that would make me less desirable as a teacher. Medical insurance claims is something employers worry about with people of older age. Also, I suspect many schools look for the younger people who might be predictably more energetic, flexible, and perhaps also easier to manipulate. I don't know.
Are all the horror stories about private schools or does this include university positions?
Any advice you can offer will be deeply appreciated.