That’s why I just get those $12 generic clear phone cases with free screen protectors on amazon. My current case is 3 years old and looks perfectly fine.
I wouldn’t call those $12 cases garbage. My case is $8 and it’s really high quality. It’s really slim but slightly raised on the corners by like 1mm for a little extra protection.
I had a genuine Apple leather case for an iPhone XS that I got maybe two years ago on step discount. I expected it to age nicely but it just got weird bumps and pocks on the edges.