Can't I get 'detachment' in pill form? It would be so much easier!
No, lol, but seriously anti-depressant/anti-anxiety meds really do help. My doctor gave me two -- one for any acute, "panic attack"-type moments, as needed (thankfully I only needed that 2-3 times) -- and one as a daily, "even-me-out" kind of thing. It REALLY helped, and there's no shame in it if it helps you be a better father to your kids.
They do take awhile (2+ weeks, for some of them) to kick in, so if you're thinking of asking your dr. about it the sooner the better.
I do think they would help you with your extreme moods.