You can report players in valorant for various reasons. But why can't you give thumbs up? I play solo and sometimes I play with amazing players who are good teammates and awesome gamers. There should be a way to encourage that. In ESEA and CSGO you could write on people profiles. I'm not saying valorant should have a comment system for a good reason, by why not a thumbs up and a way to see players reputation. Maybe even give some rewards like cards or title.

Imagine if you join a game and somebody has a card with "NICE" on it and you know it requires 1000 upvotes to get it.