You are still printing too high, so further adjustment of Z offset is needed. Graphic for reference:


first_layer-768x433.jpg

If you still have curling in the corner, after perfecting first layer, then collision might have done some damage - could be either BLTouch or mechanics of the printer (axis alignment, X/Y carriage, bed surface, etc)

Then i would have few additional questions:
Can you do probe repeatability test?
Do you have enabled ABL? Did specified compensation (settings or gcode)?
Is extruder carriage (x axis) perpendicular to bed (y axis)?