All the gullywash matches were awful and boring to watch, HRG vs Mixup was just the worst of the bunch. Even if gullywash is stalematey, it's usually pretty entertaining to watch, because it's a map where teams can swap between defending their last to pushing the opponents multiple times in a single round, often just off the momentum of a single exchange. And it wasn't just gullywash, none of the other matches were very great either.
Lan was just not the best environment to be testing out such a radically altered weapon.