You don't need anyone's validation to be unhappy about how much or how often your partner drinks, but it's clear that because HE isn't concerned about the consequences his drinking has on his marriage or his job, it might not reasonable to expect him to do anything about it.
In all relationships, we have to decide what is acceptable and what is unacceptable behavior, but we can't expect someone else to change to make us more comfortable. You've been arguing about the sixteen years. Is this how you want to spend the next sixteen?
If not you need to figure out what you can do to make your life better--whether that's letting go of worrying about or nagging about his drinking and living with the consequences, or letting go of the relationship altogether so that both of you can find peace elsewhere.
You don't have to decide anything right this second, however. I'm glad you found us here.