Discussing this case is weird. No matter how you try to explain it, it sounds like you're victim blaming and it's mostly because we just don't have a lot of information of things prior to the crime. Here are a few things that people have said that "may" have lead to his state of mind: they were spending too much, she was traveling a lot, he was taking care of "small children" after work, her career was taking off, they were in financial trouble, he was tired of trying to live up to the perfect life that she showed on social media, he couldn't keep up with her ambitions, he was gay and stuck in his marriage...
Perhaps some of those things affected his mental health or something. If it did, then that's too bad and I am sorry that he didn't seek help. In general, however, I have zero compassion for him. MANY men are single dads or house husbands or full-time caregivers for their children and they don't flip and take out their whole family in one night. They were having financial trouble? Welcome to 2018. I don't have a single friend right now who isn't living paycheck to paycheck. My husband and I are self-employed and our incomes depend upon how the general public feels about us; it's feast or famine. Lots of people who run small businesses or are self-employed live this way. We don't actually know that they were overspending, that's something that was ascertained from looking at her social media pages and from the $1500 HOA court fee (which, again, we don't know a lot about). She seemed to travel a lot for work, but he mostly seemed to be with her. If this was a problem for him, he didn't have to go. However, if we're drawing conclusions from social media, I'd say he looks pretty happy.
As far as the "perfect" life she presented on social media? Again, let me introduce you to my friends' list where 80% of the people are the perfect business women with immaculate homes who throw their angelic and super-intelligent children perfect Pinterest-worthy birthday parties.(The fact that the majority of their house is actually a pig sty and their children are bratty little ninjas that curse better than me is a non-issue on Facebook.) My husband can't stand the whole FB and IG thing...so he doesn't get on there. I snap lots of pictures of him. It literally takes less than a second and then he has no idea what I do with the picture afterwards.
He was having sexual feelings towards the same sex, then he could have addressed that in the same way that many men in similar situations have before: address the feelings with a marriage counselor or separate from his wife while he explores these feelings and decides what he wants to do.
If CW was having issues with anything then he had two choices: address them with a marriage counselor or get out of the marriage.
At the end of the day, he had no more "issues" in his marriage and home life than many, MANY other men have. (I, personally, drive my own husband crazy.) These men, however, do not kill their wives and they certainly don't kill their children. I don't believe in internet diagnosing from a few interviews and social media posts, but IMO whatever finally tipped the scales was his problem and not anything that Shanann could have controlled.