This one is fair. Wasted a lot of time trying to find the "correct" dependencies—I remember the Nginx Ingress Controller specifically being a headache—only to find a maze of deprecations, poorly written documentation, or stuff that just flat out didn't work. That was ~18 months ago (I set up my cluster to run sites for my business and have basically left it alone) so things may have changed but at the time I remember being surprised after hearing so much hype.
Primarily because there was very little obscurity (i.e., config files that automate away a lot of thinking or Dockerfiles/containers doing the same). It also left me feeling more confident about stability because if something isn't working, it's pretty clear what I broke/forgot. Worst "bug" I ran into was a snap server hanging when installing a dependency.