I don't know... I am the widow of an alcoholic and I can testify that when my husband dove into the bottle, he became a very different person. The only lovely alcoholic I know is 15 years sober. Come to the alcohol board where the support threads are and you'll see that the vast majority of alcoholic are deeply awful people.
Recovery changes that for many, but I doubt Hegseth is anywhere near that.
Of course it's likely that he's just a natural arsehole, nothing to do with the drinking.