Respect his...?!
He's a fictional character!
Seriously, Metzen can write, I dunno, Durak, to be the post powerful character in the lore tomorrow! That wouldn't make it "respectable" by default!
Sometimes certain story decisions are just bad. The basic idea of a similar character archetype to Sargeras, the black sheep of the group that pulled the Satan decision and rebelled against their charge out of ambition/extremist preservation, but with Death alignment instead, isn't a bad idea on paper, but the Jailer's entire role as 7 dimensional schemer that undermined all of canon retroactively is certainly one of them.
Warcraft's writing hasn't been good in...well over 20 years, frankly, but certain things can still damage it. This and the First Ones are among them. When did you start playing/following the lore, by the way?