or perhaps.... it's just that we we're tired of the "rage and pain", maybe we are getting through it finally, it couldn't have lasted forever (or at least we didn't want it to), we had to get through it eventually, we've adapted to the new environment and moving on is just the next part of this process.
Isn't this in part, the WAS process? You put up with what seems like unbearable circumstances for a long time and then eventually reach your threshold of tolerance and "walk away"....