I’ll start.
We had great chemistry but different goals. She was religious and looking to marry and thought she could change me, a non-religious person who intends to remain unmarried and childless. I was up front about the lack of religion and the lack of desire for marriage. She was not up front about her intent to change me.
After two months of regular flings she told me we couldn’t see each other anymore, because she wanted someone to go to church with, it was my fault she was living a sinful life (totally), and she was cheating on me with another dude was a Christian.
It was a women I dated when I was in Advanced Individual Training in the US Army. The relationship wasn’t meant to last.
Before her it was a women I dated in college. Again it wasn’t meant to last.
So while they both ended I would not label either as failing. The relationships had just ran their course.