4chan is a broken clock. Users there say so much stupid shit that they’re bound to be right once in a while.
This spider kind of looks like a brown recluse.
Loxosceles / brown recluses usually have a violin “drawing” on their back, hate light, and usually run to the corners. Based on that I don’t think that it’s a brown recluse.
4chan losing its shit about them is funny though. I often find a related spider where I live, Loxosceles gaucho (nowadays mostly dead - the winter is starving them). They avoid humans and other big animals, and like to build their nests in really small spaces, so it’s uncommon to be bitten by one. (That reminds me my childhood, throwing pill bugs in the nests that gaucho spiders built, on brick holes on a partially destroyed building from my home. It was fun to watch the spider trying to crack the bug open.)
Skinwalker
That reminds me chupacabra. The myth was rather popular for some time here in Latin America, specially in the late 90s and early 00s. It was about a semi-bipedal dog-like critter, with lizard-like skin, who’d hunt prey by sucking it dry of blood.