I have legit read this up like twice trying to see if I like it or not. Its such a weird middle ground that I legit have no idea. One points its alright entertaining to sit back and watch the MC kinda be decently broken. However making him Batman without losing his parents is kinda meh. Like I can see having a MC not wanting to kill but be uber powerful (Such as Vash, Kenshi from Ruroni Kenshi, and hell Batman) Yet the fact that all his skills are based off of either killing them or putting them in to a 400 year coma or some shit. The side villains are all the same "They did horrible things to me so I joined with this dude who doesn't give two shits about us but wants to have a homosexual murder bang-fest with the guy who "killed" him before because hes strong?". Like they didn't even talk about who were the people who experimented on them if it was a the Empire/kingdom I can see the MC already showed dislike in them because of how skeevy they are, But if its some other group then why not wipe them out and just talk about they have a endless rage now or something not try for them to justify their reason for being sewage goblins. But hell its just a isekai manga shouldn't think so hard but I enjoy the nitpick of things sometimes.