Quick Transmigration: The Doormat Male Supporting Character Quits

[Quick transmigration + the Myriad Worlds + System + simp male supporting characters + comeback + some pairings] Across the Myriad Worlds, there are people born to be stepping stones, whetstones, experience fodder, and wallets for others! Their sole purpose is to sacrifice themselves so someone else can succeed! While the male and female leads live happily ever after, the grass on their graves grows three feet tall! Tang Changsheng says: “I don’t care who it is. Get out of my way. I’m not doing this, no matter what!” 1. The male lead steps on me to rise to the top, then marries his junior sister? Tang Changsheng: “Want to use me as a stepping stone? Try it, and I’ll beat you every time.” 2. The male lead of a harem story steals my childhood sweetheart, then wipes out my whole family? Tang Changsheng: “Heh heh heh. Ever heard of giving someone a taste of their own medicine?”