Scumbag System is based on a Chinese BL fantasy web novel I've generally seen translated as
The Scum Villain's Self-Saving System. I watched it on Tencent Video's Youtube channel, which I'm fairly certain is official, since Tencent is listed as one of the show's producers.
Review:
The protagonist (Shen Yuan) is a contemporary Chinese guy who's just finished a very long web novel and is looking forward to trashing it in online forums. However, in the middle of typing his comment, he chokes on a meat bun and is transported into the novel.
The novel's villain, Shen Qingque, is the Lord of Qing Jing Peak and master of Luo Binghe, the novel's protagonist. He not only stands by as his other disciples bully and beat Luo Binghe, he also beats Luo Binghe. Binghe eventually masters demonic cultivation and, long story short, hunts down anyone who ever abused him, beats them, and makes any young and attractive women in their lives (their daughters, female childhood friends, etc.) fall in love with him and join his massive harem. Eventually he traps Shen Qingque in a pot and, I think, tortures and/or kills him.
Shen Yuan's problem is that he wasn't reborn as Luo Binghe, the protagonist with invincible plot armor. No, he was reborn as Shen Qingque, and if he can't figure out how to change the story, he's going to end up a broken man trapped inside a pot. Unfortunately for him, the mysterious System that transported him into the novel also has a few rules for him to follow. At least initially, he's not allowed to behave out of character without losing B points, and if his B points drop to zero, he's dead.