maybe that just says something about the vibes between you and that person, i play bad when i'm around people that i don't vibe with.
Pretty sure he was commenting on how most people over inflate their skills in front of others, then their play that day is sub-par to their boasting.
i'm pretty sure i knew exactly what he was commenting on but was just giving an alternate perspective on how he's viewing the reality of the situation. just because people inflate their skill through gab doesn't mean that's exactly what is happening all of the time. some people truly do play better by themselves due to social anxieties or uneasiness around certain people due to their conflicting attitudes.