The armchair psychologist in me can best define it as completing a life goal, like a trilogy - and not getting my fantasy results was a 'breaking point' but not in the way of being broken.
It was more like, by fulfilling a very old fantasy; one that was admirable but with incorrect motivation from the start. And when your brain can only accept the end result, it rewires... well everything. Neuroplasicity is weird. And scary.