TL;DR for why everyone hates it: Said writing decision was generally considered to be completely stupid and clearly done for shock value, it reminded people of nasty hentai because Zipper is a fly and zoophilia because he was treated like a pet, Gadget was a waifu, and it seems to have origins in intersectional progressivism considering zipper has a black voice actor and Chip was ship teased with Gadget in the cartoon therefore making the whole thing reak of interracial cuckoldry, a fetish popular with the regressive left for political reasons.
TL;DR for why everyone hates it: Said writing decision was generally considered to be completely stupid and clearly done for shock value, it reminded people of nasty hentai because Zipper is a fly and zoophilia because he was treated like a pet, Gadget was a waifu, and it seems to have origins in intersectional progressivism considering zipper has a black voice actor and Chip was ship teased with Gadget in the cartoon therefore making the whole thing reak of interracial cuckoldry, a fetish popular with the regressive left for political reasons.