Cuckoldry is rampant among Christians, but I'm not as quick as some to say that it can't be saved.
Chrsitians lead the crusades and the reconquista, and in part inspired the renaissance. Many great works of art and architecture that are quintessentially European were inspired by the Christian religion.
It feels wrong to just abandon the religion because of modern cuckoldry infesting its ranks, but I'm not sure how to go about fixing it.