Have you ever disagreed with or resented one of your parents staying with the other after years of strife between them or other slights?

I was not in that situation so no. 

My parents divorced when I was 7. My Dad had remarried before I was 8.   I did not resent any of my parents.  (I consider my step-Mother as one of my parents)

I remember my Mom and Dad fighting a lot. So I was relieved when that stopped. 

That sounds like personal information. I'm not at liberty to disclose it. 

Never, it was not my fight or place to object.  Survive anf move on was  my objective