Later I learned that having 3 or more different ways to get an identical result is... time-consuming, at best. When they all might work slightly differently depending on several layers of context (or just not work), you realize CSS is ripe for massive pain points to spring up, and they can happen unexpectedly. I understood why everyone else hated CSS - under time pressure, it's just not worth dealing with 99.9% of the complexities for immeasurably small + abstract returns.
Eventually, I determined that I both love and despise CSS in different aspects. It's complex enough to hold both attitudes. And I'm very, very satisfied that Tailwind came along and (nearly) perfected what Bootstrap et al were figuring out before it.