My first X has been happily married to an architect for over 30 years. She got caught having fun with my best friend in my bed. That alone ended our marriage.
My second X wife and I were gifted/blessed with a beautiful daughter who now has brought me two beautiful grand kids. That X and I are “friends” which means we are polite and respectful to each other when our paths cross. She has had two more marriages. Both failed.
Sometimes Divorce is the ONLY way out of the misery and ultimately is proven to have been the RIGHT thing to do.
Marriages within the Church are forever, though. Legal separation, even legal divorce is permissible within that higher law. Just not so-called “re-marriage”.
Admittedly, there is the argument that children produced by unions referred to in the secular society by the term “re-marriage” are blessings bestowed by God. And so, how tough can we be on those who “re-marry”?