Hi darkdecade and Welcome to the site
I'm sorry to hear about your failing r/s and the effects on you. You're certainly in the right place for support. You're not alone in this. Other members can relate to what you're feeling and experiencing. We will help you navigate through this.
Any suggestions for how to respond to my children who think my spouse is the innocent victim and that they have been abused by my frustration and anger?
Can you give us a little more detail about the circumstances surrounding your children's views here? What would lead them to believe this?
Love and light x