It can be enraging. Checkout https://tinkeri.ng/ - I just added a layout-switcher "Neubrutalism" at top right. The existing theme is standard fare. Both look alright. I told C3PO to follow the guidelines set at https://neubrutalism.com and lessen the shadows.

I have to say, having a background in doing detailed design work makes it much easier to write the right prompt. Also, having the ability to deliver a theme-switcher like this is very handy. There is a tradeoff. Adding this switching took about 1hr 10mins. Last 10% of the result always the most time-consuming.

Dark/light switching is also important.

If I had built this from the ground up manually, I could implement my own design and fiddle with things on a minute level but this type of granularity gets lost when building at speed.