When things are good before marriage, or there is barely any engagement period that there’s no chance for anything to come up, and things start to go sour after the wedding—THEN i fully advocate working it out to the best of your ability. RUnning away should NOT be the first option..
However, when you’re only engaged, when there’s no legal documentation (nikkah etc), then wat is keeping you together?
“I love you” is clearly not enough to keep a relationship going, else so many couples wouldn’t divorce.
I don’t think its “running away” when the fiance and in laws (on both ends) are causing severe troubles within teh couple. Its just protecting yourself.