I agree writing would help mental relaxation. 
What a lovely father you are. I have no memory with my father in a children playground. 

oraltosun

I actually read a lot. There isn’t nothing much I can do otherwise, right? But I think what I can do is to write more to get my thoughts out. Specifically about the pleasures of raising kids. Hopefully this will stabilise my temperament a little

cryotosensei

Confessions of a burnt-out father

It would help being organized or sharing Kids time with your wife. I mean at least one empty day a week without children with the help of your wife. The same help could be provided by you. Thus there would be free days for both of you.
One more thing:
If you had a regular reading habit in your life your mind would be more relaxed than today. Do you read regularly?

Kindly