Lots of drops and deflection on the K. Might want to gently dab that head with a saturated swab, then wipe down the wipers with the same swab. Then fill the capping station with cleaning solution and park it for a few minutes. Follow with a powerful cleaning, and another test print.
My SP540V has been put through the wringer and the K head is still good. Nothing like what you are showing.
Last thing is if you are using a 3rd party ink. You may have nozzle clogging due to variations in pigment particle size.