I object to the word "objectively" there. Subjectively to you it is worse. I can't stand coffee with sugar. It's just a sugary drink, not coffee. I drink coffee either black or with a bit of milk - not coffee cream. Coffee does not taste bitter to me. Grapefruit on the other hand I cannot stand. I'll spit that out right away. I would say grapefruit is objectively the worst thing you can eat, yet I have to accept that it's definitely subjective as some people eat it without blinking an eye.

Same goes with sour. I love sour stuff and things I drink and eat that are perfect, you might find "objectively too sour", while it's really subjective.