Lagran CPD

Yesterday I found out there's a "Filter" in some controllers that makes your stick "jitter" to improve aim assist close range, this was used by pros at LAN (allegedly), how can you use and defend using this shit, if I download a macro on my mouse that jitters it so I can have no recoil long range, I'd be instantly banned, now the problem is, its been banned in ALGS but ranked is gonna be infested with this shit. Just ban custom controllers already or atleast do something about it. Shit is getting really sad to be some of the only MNK players left in this amazing game (yes i complain about aimassist alot and i just need to get good i get it) but alot of people (chat) have said that its really sad to be a casual MNK player at this point cause its impossible to keep up