>>54034080Short answer is that Quick Claw is not broken.
Long answer is that Glowbro was a Smogonite's bromon and he wanted to make it work with the Quick Claw/Quick Draw gimmick.
The problem was that it just didn't proc enough to justify using. The solution to Quick Claw not proccing enough was to add more Quick Claws. This makes it so that, throughout a game, it's proccing many times.
Now statwise, Glowbro is a frailer than the average tank. So the Smogonite decided to run a dual screens team to compensate for that.
And in addition to Glowbro and the setter, he chose some of the strongest slow mons available, who would benefit the most from Quick Claw. The strongest slow mons were bulky offensive mons. Ones whose BST is more focused into attack and defense than speed.
The reason I'm explaining all of this is because the secret to the team's success was not Quick Claw. It was using dual screens on a bulky offense team. The two elements that the Smogonite chose to complement Glowbro complemented each other.
For the most part, dual screens is used for hyper offense. Set up screens so that your fast and frail attackers can boost and sweep.
Most players never really bothered to use dual screens for teams that were already bulky because it felt redundant. But in reality, bulky mons benefit more from defense boosts, not less. Quick Claw was just a bonus that allowed the slow bulky attackers to sometimes eliminate the advantage fast frail attackers held over them on pivotal turns.
In addition, this generation added a bunch of strong bulky offense Pokemon and the gen 9 metagame already trends toward hyper offense (which bulky offense is naturally good against) so that's why the archetype is popping off so hard right now.
That and because the absurdity drew a lot of attention.
Even if Quick Claw gets banned (which I think it might, since Smogon is always biased against RNG elements), I think similar teams are going to continue to thrive.