No - and I hope to God you're still young and thus able to blame this idiocy on age.
The title of this submission was enough for me to determine this was written by an incel.
Kids in middle school are notoriously cruel, forming friendships one moment only to dissolve them not long after; picking on minor flaws in others to such an extent it's a wonder they have time for other activities.
I daresay most kids - especially during the changes associated with puberty - have a hard tine at first in adjusting: Their voices change, they perspire more, they may develop acne as well as mood swings, and certain gender-specific changes occur as well. Perhaps even more daunting for some is the sure knowledge that adulthood is fast approaching.
Even the so-called popular kids, when alone, flex in front of their own lavatory mirrirs, examining the fuzz that may one day grow into a beard; or, if they're girls, they may look at their level of development or wonder how it was that their once unmarred faces now need weapons-grade topical cream to treat the acne.
The majority of people mature past the idea that looks "define you," in part because they've seen the slight-of-hand behind the commercial standards of beauty, and in part because they have either heard of or met individuals who look in some cases frightful but who act with kindness and behave like civilised human beings despite being treated, in some cases, with dreadful cruelty (and often at the hand of persons such as the OP).
No, Vegeta, your looks do not determine your personality. If they did, Ted Bundy would be a model citizen - and that's just to name one.
I've read enough incel crap by now to recognise the entitled attitude so many have. Couples with the defeatism that leads people like the OP to conclude obe cannot change his looks an nor his personality.
Oh yes, people can be incredibly mean, inckuding adults, but it saddens me to see how the OP is perfectly willing to conform himself to their expectation.