[crosen99]

Same here. I think it's because you typically conquer a language by developing a fairly complete mental model of that language's behavior, but with CSS there are just too many nooks and crannies to get your had around. While it's uncomfortable for me, I find that I do best with CSS when I take a more practical approach and just try to use best practices to accomplish what I want without having the deep understanding that I crave.

I've found that Kevin Powell [1] is a great resource for this approach, and he also helps with the model model aspect as a bonus.

[1] https://www.kevinpowell.co/