Yeah, to be fair I can see where they're coming from though.
His ult just isn't that great though, 2-3 wards are more than enough to cover the entire map, and i've found once to game passes 20 minutes, most teams just stick together, making the reveal kind of useless.
I've never met a single good TF player, they just dont seem to be able to put out the damage/use their attacks.