I want to read a novel with an mc who is done with people and their bullshit. Who will kill and torture for his own reasons and not accept any shit from anybody. I want that feeling of powerful badass mc who does things and lives on his own terms instead of following others. Also, I am stressed from dealing with stupid people irl so I need some relief. Bonus points if the mc is actually honest with himself and better than others. (For example killing people that annoy him by being hypocrites instead of killing because he is a loser incel) Thank you.
I guess Reverend Insanity is quite close to your requirements. MC is a definition of ruthless after all. However he's not so powerful at the start and he acts like he follows the rules for some time although in reality he does almost whatever he wants. I wouldn't call him a hypocrite for sure and he knows his limitations well, but he doesn't kill others just because they annoy him. There's always a plan or scheme to it.
If it is just that much, there should be lots of novels that fit the bill, like: Overlord Demon King, Retry! Renegade Immortal
Return of the immortal urban cultivator He kills freely anyone who annoys him. And they repeatedly do so.
If nothing has changed the author is on hiatus due to censorship issues. As far as I know he claims that he's going to continue writing in the future in spite of the ban problem.