MTL - I’m Just a Pharmacist - Chapter 4 The more you live, the more you go back

The main character Lei Yu does not have the ability to practice his family’s martial arts. He gets stepped on and tossed around. Due to certain reasons, he leaves the family, coincidentally gains an ability, and makes his own path to becoming an immortal.

- Description from Novelupdates

Adam, who mysteriously transmigrated to the Marvel universe over a decade ago, has established the powerful Umbrella Corporation. Now, he's unleashing a new era of viral evolution. The Progenitor Virus, T-Virus, C-Virus, and G-Virus are just the beginning of his sinister plans.As heroes and villains struggle to contain the chaos, new threats emerge: the Blacklight Virus, Z-Virus, and the dreaded Cthulhu Virus. Adam's shadowy influence grows, pushing the Marvel universe to its limits.

Su Heng had traversed to a world where demons were resurrecting, and the human realm was like hell.Water ghosts, fog demons, and drought monsters... powerful demons plagued the land. Major clans used fierce spirits for medicine, residing high above the clouds, while common folk struggled desperately amidst a divine, eerie apocalypse.In these chaotic times, Su Heng awoke with the talent of a Celestial Eater.His body grew limitlessly, gaining a property point for every pound he gained in weight.The bizarre and terrifying demons who slaughtered cities and eradicated nations were, to him, the most sweet and superior ingredients.He devoured their flesh and blood, feasted on their sinews and bones, plundered their Divine Skills, and seized their destinies.From the “Pure Yang Skill” to the “Heavenly Demon Transformation Technique,” from the “Golden Bell Guard” to the “Demon Buddha's Golden Body,” even the most ordinary martial arts in Su Heng's hands could burst forth incredible power.Years later...Su Heng's demonic body was colossal, his weight immeasurable.With a hundred hearts and a thousand arms, mortals were nothing more than ants to him — all gods and buddhas of the heavens, come to battle!

[I was reincarnated as an F-class Hunter.

…it’s a problem because they don’t treat me that way.]