Been reading the Deathworlders book(s). Basically a FOSS series of novels. Sounds like it would devolve into bad fan fiction. 1,500 pages in and I'm still diggin' it.

Humans come from a "level 12" planet. Sapience isn't thought able to evolve on a level 10, too dangerous. Too serious on every front; Gravity, weather, temperature extremes, microorganisms, parasites, predators, radiation exposure, all that.

First chapter is a human on a space station trying to get processed through emigration when the baddest-ass aliens of all lock on and board. He beats one to death with its own arm. Basically like a chimp in a preschool of giant, soft children.

Gets hilarious when the same guy is finally back home bartending and, as Earth watches in awe, those same aliens invade a Canadian hockey game.

Epubs and such are readily available.

https://deathworlders.com/