
Can someone explain me wtf is wrong with Anubis? And The Seth and Osiris thing? I’m confused af

Anubis currently has two curses on him.
1st curse: described as one "shared" with Horus, introduced in chapters 20 and 21, and discussed again at the end of the Horus-Anubis' flashback in chapter 26.
2nd curse: the one he got from Seth's weapon by mistake, in chapters 37 and 38, while he was possessed by the undead Osiris (Seth was trying to put on the curse on Osiris, but was tricked into giving it to Anubis instead).
The first curse is one that he's had since before the beginning of the series, which no one knows yet where it came from (though they all suspect it's related to Seth), and it's the "lighter" curse of the two, as it does does nothing except stunting his growth... (and thus, preventing him from becoming a god, as he needs to develop a perfect "adult" body, together with a perfect mind, in order to be able to become one).
The second curse is the one that Seth intended for Osiris but accidentally gave to Anubis instead, when he tried to cut off Osiris' arm only to find out he had just cut off the possessed Anubis' arm instead. That second one, the one on his arm, is lot more dangerous, as it contains the curse of countless human souls and keeps getting worse, so much so that it could eventually kill him.
The only way for Anubis to escape death from the second curse is to become a god, which will give him the power to get rid of that curse... but in order to become a god he needs to overcome the first curse that is keeping him in the form of a kid. Seth summarizes all the options left to Anubis at the beginning of chapter 39.
I didn’t expect this from Harada but it was worth itttt