Partner Ruining all the Fun

I feel like my partner is ruining mine and the kids’ happiness practically daily when he’s home. He complains what feels like a lot, can be really strict on the kids behaviour and disciplines in a way that I think makes them feel bad about themselves, doesn’t like when we babysit other kids or spend too much of our weekend on activities and then just randomly can get huffy for things that aren’t anyone’s fault e.g. he hasn’t eaten because he didn’t wake up early enough before going out. I am a really sensitive person and as much as I try to separate myself I feel like the fun is always taken out because something happens to make him unhappy. I don’t know what to do about it though. Am I being unreasonable? I’m sure there are days where I am rough and grumpy but I don’t think it’s nearly as often. I don’t know how to approach him about it or even if I should. Honestly, at times I think maybe I should leave him so I can be free of the stress of constantly worrying about his emotional state. He’s not abusive I don’t think but it’s just hard for me to cope with. I also know it’s normal to complain and I like that he does talk to me about what annoys him, but at the same time I just want to be able to enjoy a single day without an issue. I might be reacting this way because of my own issues and past but could you please give me some advice? Has anyone experienced similar? Thank you x