The worst thing that happened to me wasn't a haircut, but I was getting a relaxer put in and the chemicals were too harsh, ( I cried too lol) so it completely ruined my hair, I don't think the hairdresser knew what she was doing.
Maybe 6 years ago I put a relaxer in my hair and maybe a month later,a hair color. While washing my hair,it fell out in my hands and I needed to get an emergency hair cut. The guy had no idea how to do hair! The hair cut was awful. I wanted a Tboz (TLC) and he gave me a jacked up mess of a cut. That was the last time I went to a salon.
I have virgin hair, so I can't begin to understand the complexities of relaxers, I do know that a lot of people have complained about the issues you have encountered. Depending on how much damage the relaxer has done o your hair, try cutting it into a bob.