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.
First party sites are how my credit card gets leaked every single time. The incompetence is thorough at every level.
My personal trick is even in my own country to get new travel credit cards regularly. The first one I got was scammed on my first booking. I alerted the hotel and they said it couldn't possibly be them. They're the only company that ever got those details it can only be them.