That's how I was around 40 (though my children were 6 and 3 at the time). I'm definitely going through a midlife crisis. One thing I've learned about myself in this period (it started last year) is that there is nothing worth losing your own mental health over. If you aren't mentally healthy and stable, those you care about the most are going to suffer all the more for it. Sometimes you have to pick the least of multiple bad options, and often "powering through" is not that.