The first thing I need is a user-block feature. (HN has done an impressive job at nurturing civility, but it's time.)
I saw a promising-looking add-on for Firefox, but it had only a few users so far, and there was a blob of Wasm in the `.xpi` that was a barrier to a very quick skim of the code.
The comments section has become more cluttered and quippy than I'd prefer. This is likely due to the influx of users from the decline of Reddit.
I've started developing my own ad-hoc browser extension that adds a "hide user" link next to each commenter, but it's not yet in a minimum-viable state.