We have some kind of k8s cluster that's just locked into a state where we can't delete it because of some wacky dependencies that no one at the company understands (it was set up by others). So at some point we'll reach out to amazon to have them wipe it.
EKS is a special level of IAM pain, and my belief is they do everything possible to make it hard to use so people don't get all excited about that kind of cloud agnostic technology
It's kind of a messy product.