People who rate other people's attractiveness and act like their rating is objective truth
I fucking hate when people call others "a 2" or "a 10" and then also act like whatever arbitrary grading system they use is objective truth, as if someone who looks hot to one person can't be average to another.
It's not just terribly objectifying (literally reducing a person to a number), but just factually wrong because being attractive or good looking really isn't as objective as people think it is.
I've had this situation before where some of my friends thought a guy was really hot while I didn't find him attractive in the slightest. Meanwhile, some of them didn't understand why I thought a particular guy was good looking. If we graded those guys on a 1-10 scale (what we aren't doing because we aren't fucking losers), the same guy could easily be a 5 for one person but a 10 for someone else.
I can't help it, whenever I see someone unironically grading a person's appearance I just immediately assume they're either an incel or at least a manosphere asshole, or whatever the female equivalent of that is. They're so deep into this whole "attractiveness is objective" nonsense that you could never convince them otherwise because they'll just accuse you of lying when you point to an "objectively unattractive" person and say you find them hot.