I'm not sure if I'm really understanding your question completely or even in part. From what you wrote I suspect it might be a problem with your software. The software that comes with USB turntables is basic at best and doesn't allow for the input signal to be cleansed properly. So no matter what you are trying to rip, the end product will be unacceptable.
The year in which the record was recorded should have nothing to do with the quality of the rip process, provided the source in in good condition. If the source is crap to begin with, no software will completely restore it to its original condition, but it can help somewhat.
I've been ripping part of my LP collection (about 3,000) and some are more than 50 years old, without any trouble.
Also, you might want to consider cleaning your LP's first. A good brush (at the very least) will help. If you don't have access to anything else do this. Take a microfiber cloth and wet it. Run your tap with some tepid water and gently wipe the record surface with the cloth as you let the tapwater run onto your vinyl (not the center). Let it drip dry on a dishrack. This will help, although the audio purists will no doubt reem me for not using a distilled compound.