Don't think I've ever said shove it.
In fact in most cases, I've tried to negotiate with my employer to remove the reasons I want to leave, and I can't remember an occasion when that has been just money.
If negotiations break down, they breakdown, there's no real right and wrong to this, it's just that you don't have common enough goals to make a continued relationship a sensible option for either side.
Your boss might have shafted you, there may have been a breakdown of trust, maybe there is just nowhere for you to move on to to develop yourself. So be it, time to call it a day, it is what it is. Exit the building in a calm orderly manner, your integrity and professionalism intact. Otherwise all you do i justify the reasons they gave (often not the real ones), why they chose not to try and keep you. What's the point of that?
