I had the same question and made a browser extension that addresses many of the complaints in this thread (poorly-positioned elements, sizing, dark mode): https

I had the same question and made a browser extension that addresses many of the complaints in this thread (poorly-positioned elements, sizing, dark mode): https://github.com/dan-lovelace/hacker-news-pro https://github.com/dan-lovelace/hacker-news-pro. It lets you completely rebuild the layout however you'd like and has some pre-made themes that do a decent job without writing one from scratch.