No personal stats since this isn't relationship advice for me. I have a christian friend who himself is decently masculine. He lifts regularly; I don't know those stats but he's a good lifter, body fat a little high, closer to 30%. He's been steadily advancing in his job and has been consistently bringing in higher pay in his commission only job past few months. At home, he does an ok job leading but can be blue pill at times.

The biggest issue is his wife. She's carried self esteem issues from her childhood, family and past relationships into this marriage and won't let go of them. She feels she's unattractive and unworthy of a good marriage, and instead of being grateful for the definitely above average marriage she has, she says her husband is stupid for choosing her given her faults. And she can't be reasoned with on this topic even though he loves her and shows it (although in BP ways sometimes). Normally, RP advice would be to avoid this type of girl, but since my friend is married to her, what's the best approach for him for him to improve this relationship? What's a good resource I can give him that's not just telling him to browse r/rpc?