you know you asked is all the trying and effort worth it?
I think it is.
I'm only speaking personally, but when I got married it was for life.
I made vows and made promises and I can't turn my back on that.
Maybe for you that wouldn't be enough and perhaps going it alone would be better for you and the girls.
If you have any love left for dh I'd say stay and work through it all, but life is very complex and no one understands relationships better than the people involved.