I find the wording here a little odd "after sex, that i did not want in the first place"
What does that even mean?
Did you articulate that you did not want the sex? Did he then force himself upon you after you said no? If he did, then call it what it is - 'Rape'
But that wording gives me the impression this is more sower grapes, not rape.
Regardless of above, frequently coming home drunk is reason enough to get a divorce in my opinion.