Brains differ. Bodies differ. Your personal makeup just happens to include a higher susceptibility to the ravages of alcohol abuse than people on the thick part of the statistical "bell curve." Does that makes you a "terrible person?" Only if you identify yourself that way.
My own "outlier" experience happens to be on the other end -- it's about slowness of recovery from alcoholic damage to the brain and nervous system.
I can only shake my head in awe of some of the folks who come here to SR, sober up after 30 years of the kind of extreme heavy drinking that I could only imagine, and report feeling absolutely 100% well within a week or two.
I've been sober for over 2-1/2 years after just 12 years or so of heavy drinking, and I'm still dealing with brain and nerve damage issues!
Does that make me a "terrible person?" Only if I let it.