DH and I were together for 10+ years before having kids and in that time I could count our arguments on one hand. Even after the "honeymoon period" ended we were always very contented together iyswim. We now have 2 dd's age 5 and 2 and seem to take the stress of parenting out on each other or one of us will be tired/ grumpy and this brings the other one down too. This has become a bit of a vicious cycle.
We both work part time and share childcare and housework and have some time for our own hobbies.
But I feel like time as a whole family should be happier. I would say DH is happy and relaxed maybe only 15% of the time, otherwise he is prone to snap at dd1, is a bit distant and grouchy in a kind of passive way e.g. Making comments about how no-one puts things away (meaning he is annoyed I've left X out). Possibly I'm similar.
Any wise thoughts? I don't know if we can talk about it without taking each other too personally and making things worse :-(