You are most likely fighting a Delta Calibration issue and not an Auto Bed Leveling issue. You can use M665 to fine tune and adjust some of the parameters causing the problem.
I attached a couple of files I used to calibrate my Delta.
The StarBurst is useful to see where you have a problem. You will most likely see a shape to the deformed print. Most likely pointing at one of the towers. It is helpful to identify what you are fighting.
I also attached a Delta Calibration command (G27) that I'm going to be including in the Unified Bed Leveling code. It allows you to probe different geometries of the Delta and identify which parameter you need to adjust. It maybe too much work to get it to compile into your Marlin but if you are patient, as soon as we do the Golden Release and have a Stable Branch we will have a Development Branch for Unified Bed Leveling with this in it. (And the M665 command will be getting some extra Delta parameters you can adjust too. Things will get better for you very soon.)
I attached a couple of files I used to calibrate my Delta.
The StarBurst is useful to see where you have a problem. You will most likely see a shape to the deformed print. Most likely pointing at one of the towers. It is helpful to identify what you are fighting.
I also attached a Delta Calibration command (G27) that I'm going to be including in the Unified Bed Leveling code. It allows you to probe different geometries of the Delta and identify which parameter you need to adjust. It maybe too much work to get it to compile into your Marlin but if you are patient, as soon as we do the Golden Release and have a Stable Branch we will have a Development Branch for Unified Bed Leveling with this in it. (And the M665 command will be getting some extra Delta parameters you can adjust too. Things will get better for you very soon.)