Officially Licensed Status: Because the EasySMX X20 is not officially licensed by Microsoft or Sony, using it on those platforms through adapters can carry a slightly higher risk of detection by strict anti-cheat systems.
Macro and Turbo Use: The controller features programmable back buttons and built-in turbo functions. Using these to automate inputs (like rapid-fire) in competitive multiplayer games (like Call of Duty) is against most games' Terms of Service.
Your controller has built in cheats. Ban was legit if you had it plugged in on any platform.