Animal Crossing's graphics are expected to not be that great. Honestly, think how much stuff is crammed in that game! A unique town, different from any other; thousands of items--clothes, furniture, Gryoids, wallpaper, carpet, music, fossils, etc; 200+ town characters; keeping track of it in real time; NES scores; thousands of UCs; and a whole load of other junk all on one memory card! (Which, no wonder it takes up almost an entire one.)
With all that, it'd be nearly impossible and AMAZING if the graphics were excellent. I think it's impressive enough as it is.
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If things don''t go your way, just keep complaining until your dreams come true.