Im sure there is some science to back up this theory, or rather this observation. When you make up your mind to leave your job, or your wife or your house or your city or your particular situation, there is a point when your brain changes and things or events that were once just normal now become unacceptable. Its as though a good-will tap is switched off.
A friend of mine has decided to leave his workplace of the last 35 years and almost as soon as the decision was made, he fell out of love with his employer. I have seen it many times with couples I have known too. The marriage seemed OK but as soon as one of them made the decision to leave, everything about the other person became instantly unacceptable.
I have known people that had places in the country, a weekender or a side project that they lovingly and reliably attended for years. They stoutly defended the miles travelled and the opportunities missed while they crutched or drenched or planted or harvested until the day they decided that it was too much. Then everything about the weekender becomes the work of the devil. Its an interesting thing to watch.
I have often seen it in people that do jobs they do not like, but feel they cannot afford to leave. Trust me, you can afford to leave. If you don’t love it, leave. Your soul gets slowly eaten away and you cannot help but treat those around you with disdain. That does you no good and certainly doesn’t help those people around you, and possibly does real damage to some. While I advocate for people to work hard at keeping marriages alive and vibrant, (certainly in preference to packing up and leaving) I think that is a very different scenario to work.
If you are past the point of no return, leave.