I’m not sure I can answer your specific letter. It’s always easy to wonder what the young folk are doing. Divorce is always so sad, especially when children are involved, but in regards to your grandson, I don’t think you’ve received the full story. Your grandson’s conclusion sounds a bit oversimplified and you’d probably receive a more elaborate response from your granddaughter-in-law.
I never want to imply that couples should become content with lousy, disconnected marriages. I’m all about striving to make things more intensely loving. But discovering that there is strength and love in doing for your spouse or accepting certain things is empowering. Perhaps all of us can spend this weekend discussing with our spouse and/or children the topic of realistic expectations in marriage, making sacrifices and finding contentment. It promises to be interesting table talk.