I don't expect an actual religious person to suggest this, but Henry the Eighth had his way out, and I don't see any reason anyone else can't use it too.
When faced with a genuinely abusive spouse in a relationship that your religion has proclaimed sealed unto you until death, simply kill your spouse... in self-defence... which, arguably, it will be, if you're being abused.
https://www.catholic.com/encyclopedia/Self-Defense
Everyone has the right to defend his life against the attacks of an unjust aggressor. For this end he may employ whatever force is necessary and even take the life of an unjust assailant.
Now, if this person is actually religious, this is a grievous thing I suggest and I well know so. If someone is genuinely being abused... if even words rise to the level of living in constant Hell (I know they can), then whether this is true or whether the religious person just wants out of the relationship because it's inconvenient is between them and God.
That, or split up. You're still married but nothing says you have to live together (...to my knowledge). You can't have sex with anyone else, but he can't either. If he's driven you off with abuse, this is the empty bed he made himself.