he was very angry at Obi-Wan for cutting him in half
No, Maul was angry for Obi-Wan to just assuming he was dead after he was cut in half, and abandoning him there like if he didn't matter anymore. (The nerve!)
I don't remember he ever complaining about being cut. That's just fair-play.
And what you call a society where the people "exploiting workers for their surplus value" don't own the capital, but just know the person that command the police?
Or are you under the impression that rich executives or investment funds own capital?
Turns out that the part that he didn't like about "secret cabal of whatever-ethnicity people arranging word events in pedophilic ceremonies" was only the "secret".
On the original, people probably become useless after they get dementia.
On the movie, machines are crazy and stupid, and everybody acts as if its normal... so whatever.