Helldivers 2 uses nProtect GameGuard, which is a notorious kernel level anticheat. It is notorious for being problematic to uninstall and causing issues on systems it is installed in (such as straight up preventing some programs from running or causing them to crash and other terrible nonsense that should never happen). Combine that with the fact it’s ineffective and the game is PvE, and it’s nonsensical why it’s around.