Hmm, well, Kingston is a budget line so it's not shocking but it's still concerning. Hard Disk Sentinel is usually accurate but in case you need supportive documentation, it might help If that percentage is confirmed by another utility like Crystal Disk Info or HWiNFO64. I would check the warranty status or see if you can return it for a refund. You won't know if you don't ask.
You can't really compare one person's use scenario with another's but anecdotally, slightly over 2 years with light-to-moderate use, my Samsung 980 Pro is still at 100% Health via CDI and HWiNFO. Some say to cheap out on a boot drive but I'm the opposite. One might consider investing in a solid brand like Samsung.
