I've now come out the otherside. In this latest push to get dark-mode offerings everywhere I think too many color choices have become hard on my eyes. I realized it's been giving me eye strain headaches.
I've got my OS set to dark mode but there are several apps and sites that I've switched back over to light-mode. And as I've been weeding out bad dark-modes I've found that I've been able to turn my screen brightness down a bit which further helps with eye strain.