While you can't always perform a "hard block" mid-game that removes them from your ecosystem immediately, you can effectively silence them: Press to open the match menu.
Blocking a player prevents them from sending you friend requests, inviting you to parties, or sending you direct messages (whispers). how to block someone in valorant
Blocking is a communication-focused tool rather than a matchmaking one. While you can't always perform a "hard block"
Blocking is a great tool for personal peace of mind, but if a player was extremely toxic, racist, or abusive, you should consider them in addition to blocking. inviting you to parties
The player will not be notified that you have blocked them. They will simply disappear from your friends list, and you will disappear from theirs.