The end of a relationship is not always a failure. Sometimes all the love in the world is not enough to save something. In these cases, it is not a matter of fault from either person. Some things cannot be, it's as simple as that.
It's okay to disagree with the thoughts or opinions expressed by other people. That doesn't give you the right to deny any sense they might make. Nor does it give you a right to accuse someone of poorly expressing their beliefs just because you don't like what they are saying. Learn to recognize good writing when you read it, even if it means overcoming your pride and opening your mind beyond what is comfortable.