You have to remember that leveling is not a perfect science. It can't really polish a turd. Even on my Prusa's, a variance over 50 microns makes its impossible to fix. On my 12"x12" bed (mk2s clone), the bed is not great but Im lucky that it has no variance outside 25 microns, so my 2mm inductive sensor does a great job. If im reading the data correct you have some very large variances. It could simply be you are outside the spec of what is capable. You might want to double check the frame/ bed level again.