Going by the unused holes (though at least one of them looks like it was used at some point based on the chipped paint and uneven surface) they don't look like there is much of a taper even where there is one. And some of the holes don't even look like they have much of a taper at all!
I responded to your inquiry in that other post about similar wheels, but worth repeating here perhaps.
Wondering if a tire shop did the install or did you do it yourself? If those were tapered seats, and the lugnuts matched, they could have been severely over-tightened to give it a similarly buggered appearance. Doesn't have to be just that the wheels were moving around and banging on the studs. Could easily have been mooshed out from too much torque.
Seen it happen too many times from shops with mega-impact wrenches. Even when using torque sticks they can over-tighten the lug nuts.
As I mentioned in the other thread, the local Goodyear dealer had to replace my friend's Mustang steel wheels twice! They buggered them up the first time, then buggered up the new replacements with too much torque. Deforming the tapered holes and ruining the lugnuts in the process.
Takes a lot to do that at home, given the usual tools. But of course if the home is equipped with a big compressor and a high-powered impact wrench (or later model electric impact for that matter) it's entirely possible to over-torque a lug nut right in the driveway/garage.
Paul