A murderhobo party playing TTRPG pisses of a GM so hard the they flip a table and kill one of the players sending them to an isekai world. They reincarnate as their dwarf character.

~~Some stuff~~ something happens

They become GOAT and one with the Goat.

A homeless man gets killed by a group of sadistic rich frat boys for fun. A seemingly benevolent god shows compassion for his ordeal and offers to reincarnate the man in a fantasy world. Our MC was a hikkikomori otaku before he got kicked out of his home and jumps at the opportunity with visions of all the imaginary adventures he's been on when he used to consume otaku culture en mass.

But alas, the world isn't a fantasy novel and even the gods are even worse than frat boys. Instead of loading him full of cheat skills and sending him to a fantasy world full of big busted elfs and 1000-year-old lolis, he is send to a desolate hellscape inhabited only by hellish goat-deamons where our MC now have to survive with nothing more than what he can forage.