I vaguely remember a dark manga posted on here years ago about a child born with dark tendencies that starts a gang and I think kills another kid, and gets into orgies with his own gang. The art style was cartoonish and "creepy", almost Tim Burton-esque.

A key detail I remember at the end is that the child gets stuck in a pig pen and is eaten alive by them and remarks that humanity is lucky he did not grow up to get into religion or politics.

I also remember that at the beginning, he is dressed up as a fruit or vegetable by his parents for some local tradition and is meant to fall down from his unwieldy costume but doesn't, and is instead shoved down by his parents.

ChatGPT couldn't help me find it. I plead with you, /wsr/, help me remember!