>>56418608It's harder for a wall to be overpowered, but Smogon also blatantly ignored when walls were way too strong in the Isle of Armor meta. Toxapex and/or Clefable clearly deserved to get banned at the time because the game lacked viable wallbreakers. Nidoking and Toxtricity were OU for a good bit because they were some of the few Pokemon with a chance of breaking stall.
The Smogon users knew it too. The Toxapex thread was filled with everyone from low to high ELO complaining about the thing. Smogon didn't want to go too ban happy though, so stall ended up being the strongest playstyle in OU until Crown Tundra released and dropped some decent wallbreakers on the tier like Kartana and Lele.