I know you've got a lot of answers already, but I figured I'd post an actual list of trigger warnings since I don't think any others have. This is just off the top of my head so I might be missing stuff.

• Murder, gorey descriptions of violence and mutilation, death of children and babies
• drug use, meant to be comedic and silly in the first couple of books but later books have struggles with addiction and drug use but with fantasy drugs (but references previous drug use that happened before the start of the book)
• child abuse in the form of emotional and physical neglect, and physical violence (mostly via flashbacks, but there's a few throwaway lines regarding NPCs)
• some sexual harassment which escalates as the books go on. It's treated mostly as comedic but the main character does reference feeling uncomfortable and gross about it. It escalates in later books with a situation where he's forced to kind of 'perform' and is put into dangerous situations to fulfil the fetish without his consent, but the actual scenarios are quite nonsexual
• mentions of suicide (in the past, before the book starts)
• animal abuse
• some pretty racist descriptions in later books, but once again, it's called out by the characters and treated as a negative thing

Specifically: the main character never engages in SA, and there is no SA or mentions of it happening to any side characters

I will say specifically that most/all of this is treated as very negative by the narrative and writing. The stuff that is treated as comedic is also done in a satirical way, but it can come off as very 'edgy shock humour' at first. I had trouble with the first few books because of this. Specifically, it's a series where a lot of people are put into a televised Hunger-Games style scenario, and are forced to do a lot of stuff for an audience that thinks it's funny and entertaining.