Once it's happened to that extent, it's going to be 'bout impossible to correct those tires. If your camber isn't visibly negative, then it looks like a little too much toe in, most likely.
Always get the before/after printout of an alignment. At least you can begin to understand what was wrong, what was corrected and what may still be not right.
If your alignment checks out and you're interested in putting a bunch more miles on those tires, I'd have them flipped outside>in on the rims. Then try to run them primarily in the direction that normal tread "feathering" or wear will take the high spots off. (This is opposite for front and rear wheels) If you haven't rotated them in a while, you'll feel very slight "feathering" of the sipes in the tread blocks. Normal competent tire rotations that take this into account and change rotation direction or stress on tires (drives vs steers) "can" help you get this wear pattern partly back in order. More importantly, you won't be making it worse.
Or buy new tires...
FWIW, the half dozen TBs we have here (company trucks) ALL are very easy on tires, even the Duratracs which generally need attention like any other mudder. I keep up with my rotations, but I know a couple of the managers do not and the relatively even wear with aggressive tires speaks to how well these trucks "generally" are aligned.
