Interesting topic, but quite hard to cope with.
In my life I've always disliked my looks, since I was 10, as long as I remember.
When I was 10, there was a guy in my class who connected classmates to some animals, just for fun I guess. He chose the toad for me.
When I was 11, some guy who was in a sport team with me, once called me 'roach'.
In my 14-15, my classmates used to point the finger at me laughing and calling me 'loser'.
The rest is not so different. Nobody gave me any nickname nor associated me to some ugly creature, but I know what men and women think about me; the fairest sentence a girl told me still remains "When girls look at you usually don't say 'WOW' but don't either say 'What the hell!'" - that's not really encouraging
Another girl I know once told me "How could you expect somebody to appreciate you if you don't appreciate yourself first?". I don't agree with her at all: frankly, I think this sentence makes no sense
Well, some days I look at myself in the mirror and say "I hate you, ugly monster"; some other days I think "Ok.. I know I'm not attractive, but what can I do with it?".
I don't think it's a big problem. I mean: I could be ill, I could be starving... etc. I try not to think so much about my looks, I don't want it to be my main concern.
Moreover, in my life I've seen girl and boys who aren't deemed at large attractive getting a bf/gf and being happy. Maybe they just discovered something 'invisible' in the other person.