I have hundreds of CDs from the 80s and 90s, most of them bought used from charity shops. The vast majority play perfectly, despite some of them having obvious signs of poor storage/handling.
I think it's more likely your CD player is failing than your CDs.
I had some CDs that I couldn't get an accurate rip from so I took them to a used games store and they polished them for $1 each and all but one I was able to rip them all perfectly. I think the one that continued to fail must have had a flaw on the label side.
I think it's more likely your CD player is failing than your CDs.