
Why is he taking shit from them why is he acting like a pushover I am tired of this.

I guess since the manhwa is more comedic than the novel in tone somewhat the more traumatized Han Yoojin doesnt really translate well and so it makes him seem like a pushover who's willing to be treated like shit by the S-Classes. The internal narration in the novel is more complete so you'll see his point of view more. :)
Am sorry but the the lovey dovey lovers are unnatural and irrational so the way the story changed it seems so fake
frrr the dukes behavior at the end was actually crazy like what(⊙…⊙ )
Yes !