Ok, so the screen looks ok whichever table is used.
I have changed the example Calibration sketch:
Touchscreen_Calibr_kbv.ino is attached.
Please try it and tell me if it helps you. It diagnoses the Touchpins and reports the Wiring and calibration values.
Yes, it refers to Portrait as "vertical scroll direction". I am not sure how to word things for your "hardware landscape" controller.
David.
Edit. Updated the attached sketch.
TouchScreen_Calibr_kbv.ino (13.2 KB)