it's an idiotic construction— the prefix may be originally greek, but has taken a specific connotation in english, while 'pattern' is from french, and the '-y'

it's an idiotic construction— the prefix may be originally greek, but has taken a specific connotation in english, while 'pattern' is from french, and the '-y' suffix is more common in english anyway, so the correct form for the idea would of course be anti-pattern–y