I think the reason Sauron never really messed with dwarves or dwarven kingdoms on the same level as Men or Elves is because every time he looks at a dwarf he just thinks of Aule and that makes him crash out a little bit.

I think it's incredibly funny that he gets the name Sauron in the First Age when at that point he's basically just an overworked, over-glorified, and overly-harassed secretary.

Morgoth sitting on his throne all day brainstorming increasingly disturbing and convoluted trolley problems.

Do you think Morgoth makes Sauron write evil monologues for him?

Thinking about how Men and Elves could sometimes blame Morgoth for things, assigning maliciousness to parts of nature he had no role in.