That sounds fine to me. You could shorten it a bit by exchanging "this behavior of yours" with "your behavior".

It does get the point across but it could use a little restructuring. I would say it more like... "I would like to describe how your behavior has been unprofessional and unfair." I hope this helps. Mat

The sentence does make sense. A more natural way of saying this would be "Would you let me show you how your behavior was professionally unfair?"

thank you everyone very much for the help, and the fast answers!!

Since there are already a number of responses to your question, I offer this simply as a comment. Your sentence makes perfect sense. It sounds "professionally" worded. You are using the word "highlight" as an idiom. It suggests that you want to make some parts of the behaviour in question to "stand out" as professionally unfair behaviour.