Please help with my 2010 Ram 2500 4x4 steering.

Make sure you have an alignment and make them give you a copy of the numbers they come up with. Tell them ahead of time you need a copy or you won't get it from them.
Besides the cupping issue, you have more tread remaining on the right edge than on the left edge, as viewed in your picture. Either camber or toe is off, but that should be a solid front axle so only toe is adjustable. If that tire is the left front, and left side of picture is outside of tire, then it likely needs to be toed out a little to help it.