We haven't leveraged player sentiment heavily since launch, since we've wanted to give players time to breathe a bit and learn the game (we leveraged it during CB though). We definitely split by engagement and MMR ranges to understand a spectrum of sentiment, so we know what feels frustrating/fair at different skill levels.
Sentiment tends to be more supplementary data - we don't inherently balance off of it and don't have strict "bands" we respect and monitor like we do with game performance data. But, it's helpful for us to understand the player experiences across our audience and contextualize how the performance numbers actually feel.
I imagine you're just using them for the purpose of an example, but yeah we don't filter by age or gaming background to make some opinions more "legitimate" than others. Yall are Valorant players now. We filter by game metrics to understand the player, like MMR, games played, agents played, etc. etc.