I recommend removing yourself and your child physically from the home when he comes home drunk after work.
I know when I had that sick feeling from a drunk in the home, I was a hot mess. Too much of a mess to handle a drunk and kids.
Since your child is young, can you leave and go to a shopping mall or a big box store that stays open late?
Some tools that helped me learn to cope with my life with an alcoholic (until I was ready to leave) were Alanon meetings, SR, and reading self-improvement books like "Codependent No More".
Let the change start with You!
I do not recommend 'discussing' the drunken behavior, how it makes you feel, or your plans with him anymore. You have spoken to him and he continues to minimize your concerns. Trying to reason with an active alcoholic is like trying to buy fresh bread at a hardware store.