I do not believe that OEM rotors are "designed" to wear as fast as the pads on newer cars. It is just that the rotors are made as light as possible and after a set of pads is worn out, the rotors are then too thin to turn without having enough thickness to absorb more heat.
Because your rotors are still new and probably have glazing on them from the new pads, the turning process should not compromise the rotors. Most shops remove very little metal during turning, the object is to have a flat surface without any grooving or lips.
I would, in your case, have the rotors turned again, clean and liberally grease the slides, and reuse the same pads. Break them in properly without stopping the car during the process and see if it gets any better.
Next time, try slotted rotors. That will allow gases under the pad to escape and help break in the pads.

Klaus
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1975 164E running? 1995 854T sweet 1998 V70 R work horse