It's not really the "being negative". It's that:
a) he purports to know what's going through the minds of 5 kids he doesn't know
b) he suggests it's the coaches fault for hosting them in January, as if the coaches chose the weekend for these kids to come, and as if they just aren't supposed to recruit in January.
c) at the slightest hint of resistance, he starts slinging insults.
That's what sucks.