>>33028429Most of the offensive Pokemon that get banned are because they're absurd mixed attackers.
MLuke, Aerislash, Pheromosa, Genesect, Landorus, and Marshadow being prime examples.
Mixed attackers are so superior to attackers forced onto one side of the spectrum that whenever they're very good they entirely warp the metagame around them. Once all the extremely strong mixed attackers are banned, you don't have as many left in the OU tier. There's still a few like Greninja and some Tapu Koko and Celesteela sets, but mostly the strongest mixed attackers just straight get banned.