For years I thought I was sending out signals anyone could interpret that I was not happy. Still, my LBS considered it a "bomb" (wow, maybe I can sling this terminology).

You sent out signals? Did you ever actually sit down and tell your spouse that you were unhappy and that you needed to seek counselling and perhaps a divorce, or did you just send out 'signals' that you expected to be interpreted correctly?

Maybe your LBS really was caught off guard! Maybe he/she just thought you were chronically constipated.

It appears you expect the LBS' to behave in a more mature manner and accept that people, situations and marriages change while it's perfectly acceptable for you to behave in an immature and cowardly fashion.