After landing and while cleaning the airplane, the Aircraft Y pilot drove up to my hangar and berated me in front of my wife for “screaming into the traffic pattern at too high an airspeed and being only 400 feet below him and they were talking to center with a Bravo clearance (wrong, ZZZ Tracon owns the Class B around here so he would be talking to Approach, not Center) and even the SIC (Second in Command) Center Controller didn’t see you” and loads of other garbage. You get the drift.