Me two years ago. Alcohol masked a lot of my rage, but I'm much better at working through things with others than when I was drinking.
I've known extremely angry people who don't drink and never did.
But yes, to the OPs point, alcohol distorts thinking and it can come out as angry and hurtful, for sure. Alcohol also takes off the filters that keep us from saying the stuff that we think but know we shouldn't say, or at least say with meaning and purpose, not blurt out the first nasty thought that comes into our heads.