It's a genetic thing, kind of like how cilantro tastes like soap for some people.

Do you drink coffee? That can kinda fuck with your bitterometer.

The only time garlic becomes “bitter” in my case is if I fry it to charcoal and it’s just little carbon crunchies. But those are more tasteless than bitter. I’ve never encountered bitter garlic now that I think about it.

sounds like the opposite of a supertaster, i'm pretty sure i'm a supertaster and to me tea has no flavour and if there's a single bitter molecule in a dish it's utterly inedible and i need to rinse my mouth.