I'm not an expert, but it sounds like if you finish a session of valorant, the anti cheat never unloads and continues to monitor memory and files.

Easy Anticheat though, according so some sources, only runs during game play.

Riots Anticheat has a bad history though. But both essentially are black boxes that send details both hash and samples back to their owners for them to approve what's on it computer. Opened a medical record? It's probably been hashed and sent back.

Opened your employers accounting files when working from home? details you probably sent riot a copy.

Both can be updated. There's no guarantees that riot won't do something nasty against a portion of high value targets. They know you from your payment details. They can identify, update the module and get anything they like, they have root.

Anticheat has a history of being a tool for hackers. https://www.vice.com/en/article/hackers-are-using-anti-cheat-in-genshin-impact-to-ransom-victims/

There's no upside for the user. Mostly because they don't work anyway.