Have you ever eaten so much that you got sick from it?
Have you ever eaten something so often that you got sick of eating it?
Have you ever heard a joke so many times that it no longer was funny?
Have you ever done something for so long that you hated doing it?
It seems like over-experiencing something leads to burn-out. But at the point of burn-out, you have to wonder: is the burn-out caused by something bad or just too much of something good. And you have to make an effort not to declare the causes to be bad, just because of burn-out.