I see your point. My recommendation if you wish to improve your designs is to do them outside of CSS if you don't already. With something like figma or Penpot you will have your fonts, palette, spacing and layout all predefined.

Then once all your views are created using these common elements, you only need to transcribe them as classes in your CSS and use those few classes where needed in your HTML.

I'm not a design expert, so take it with a grain of salt, but I used to be terrible and following that workflow allowed me to get decent.