*sigh*
...Why the constant hate?
A bug-eyed, rotten junk-mutant with nasty teeth and metal tentacles is a grim, tough, downright terrifying idea but they also made it funny and cute looking. It forms a great trio with Weezing and Muk (together they are land, air, and water pollutants), the idea of trash coming to life is actually a nice tribute to ancient Japanese folklore, and Garbodor's design style is based on that of classic children's horror manga.
Everything about Garbodor is fun, cool and clever. It fits in perfectly with Pokemon's overall style and themes, a great deal of thought went into its idea, and it's uniquely executed. It never ceases to shock me that it seems like the single most loathed pokemon of all time by American fans. Pretty well liked everywhere else, but in America, for some reason, everyone only likes "pretty" pokemon all the sudden...doesn't anyone remember similar monsters like the Toxic Crusader, Hedorah or the Heap? When I was a kid, all sorts of characters and monsters were trash-themed, and people loved them!
Some cutesy fan art by my friend
Joobr; it's equally easy to make Garbodor look silly or horrifying, which is awesome, just like Gengar and a lot of other classic "creepy" pokes.
More "cute" versions:
1, 2,
3.
More "terrifying" versions:
1,
2,
3.
Really, what's there to hate? He's like a big, fat, crazy zombie, or one of the always-cooler villains from sappy environmental cartoons.