I was in the same position as you, not too long ago. I kept reverting back to my familiar light themes.
Switching to The Dark Side finally stuck after using it for a few weeks straight. Now I can't imagine going back. When I switch to an app without a dark mode, it's like staring at the sun.
I don't have any issues with dark mode. I feel like my eyes are more relaxed not having to contend with so much incoming light.
Your typical factory pattern is an example of the OCP; move the part that changes into its own class (a factory). The class that uses the factory is closed to changes, but open to extension (new factory types).
Perhaps it's not the SOLID principles that are bad, but they way you've seen them used? More important than the principles is how they're interpreted and implemented, I think.