Honestly, the OP sounds like a justification someone could try to use for divorce when they are looking for one.
Divorces can be nasty. And some people get divorced or consider it after going through a period of arguing with their spouse. I wonder how many couples are in a situation where both the husband and wife think the other is a child of he devil, or close to it. I know one guy who referred to his ex-wife as the devil or Satan. I don't know what she thought of him.
It seems like people like to justify divorce and can really stretch the Bible to do it. Paul, in a section he says is himself and not the Lord saying it, says that if the unbeliever departs, let him depart. So some Christians will take that verse, the part that it doesn't say is from the Lord, and stretch it a bit and say, "Well, she departed from me in her heart a long time ago." So instead of her actually departing like the text says, he argues to himself that she 'departed' in her heart. And if she claims to be a believer, he can reason to himself, "If she were a real Christian, she wouldn't talk to me that way, so she must be a plant from the devil."
I've heard or read this idea before, that a marriage that has problems X, Y, Z that cause suffering 'can't glorify God.' When I hear people stay that, I find it disturbing. Why would they think God can't be glorified if they are suffering or just having a rough time in their marriage. Jesus told Peter by what death He would glorify God. That's how the Gospel of John put it, 'glorify God.' What happened to Peter? Tradition says he was crucified upside down. If that can glorify God, can't you glorify God in the midst of suffering in marriage? If you are suffering because your spouse is hard to put up with, can't you still overcome and glorify God by standing firm and loving the person? You can glorify God by suffering well, righteously for Christ sake. Joseph's brothers through him in the pit, sold him as a slave, and tricked his daddy into thinking he was dead. Yet Joseph said what they meant for evil, God meant for good.