Husband grumpy all the time

We have been married for 8 years. Had our first child 2 years ago. Ever since the baby came he has become such a grumpy person. Gets annoyed at the slightest issues. Does every household chore very reluctantly. Even something like taking the kid to playgrounds is a annoying task for him and he clearly expresses that he would rather not do it. We absolutely have no extra help so we have to pull in our weight to get things done at home. I already do most of the work at home and in taking care of our son. Its not even 50-50. His grumpiness is affecting my mood a lot and i am struggling to maintain a positive environment at home. He is not abusive yet. No other women involved. But him always being either angry or upset or depressed is actually making me very depressed. How can i handle this situation.