i hate my baby bro's stuffed animals

so i know im supposed to be all protective and stuff as the oldest but honestly my baby bros room is like a zoo with his toys and stuffed animals everywhere. every time he gets a new one it just piles up and spills out of his room into ours. i asked him nicely to clean up once or twice but it feels so childish to complain about it all the time. is this normal? am i just being a hypocrite since my room was probably a mess too when i was little? help!