i know people say hes legit and he streams but HOW someone please explain to me how his game sense is this good, i want to throw in some racial slurs but i will exercise self restraint
Not a statement on this particular match, but just because someone occasionally streams doesn't preclude them from hacking at other times. A good indicator of this is their success/record while streaming versus when not streaming. If a player inexplicably struggles while streaming that could be a tell.
Also consider, a really sophisticated hack could stream legit images while simultaneously displaying maphacked images locally. Entirely possible whether any maphack implements it or not.