Career dissatisfaction can be a huge trigger for anyone... and even worse for a man when his W's career seems more satisfying/impressive/lucrative than his own. We want to Be The Man!
The good news is work is the rubber ball, that can bounce back. Let him know you are there and believe in him as you allow him to figure his own way through this.
Similar to my sitch, your kitty kitten MLC'er maintains connection and doesn't blame you for his plight. Remain strong and build on this. I believe they'll figure it out eventually.
Have you read 5LL? What is H's primary love language? What happens when you speak it?
M: A really long time. Crisis: 5 years. She's still worth it.
Life is never made unbearable by circumstances, but only by lack of meaning and purpose. -Viktor Frankl