So I hardly EVER drink (except new year's I did have a lot of wine and actually gave my phone to a friend so I wouldn't text anyone lol), and I've still almost gone psychobitch on my poor boyfriend a number of times since starting HRT. I think it's a combination of how hormones have changed the way I process/experience emotions, but also it's because of the regular insecurities of transitioning.
Notice I said *almost.* Had I been drunk any of the times I was experiencing a mood swing, I probably would have freaked out multiple times, and not have been able to maintain my current relationship. He is a very kind and understanding person, but I'm sure some of the extremes I've dealt with emotionally would've been too much even for him.
I think alcohol *can* really get in the way of coping during a transition, because your body starts reacting very differently to things, and you need a sober head/heart if you want to slowly learn the skills to manage these very new reactions/emotions. I know I've needed this anyway.