- On mobile, Android, I use Materialistic to read HN. The UI is much better than the web version, and voting uses a standard mobile UI element (or swipe, but I don't use that). You can't downvote in Materialistic, only upvote, so if you're worried about accidental downvoting that goes away.
- zoom into the button, then click
- override the css yourself, e.g,: using your one of the many userstyles extensions or browser developer tools
- inject custom JavaScript using GreaseMonkey or Tampermonkey
- use a third party HN client. As you would imagine, there's a sea of those - one of them must be halfways decent :-D
- purchase a new device with better touch precision. Pixel 3/6 with display scaled down handles the problem of adjacent links smaller than a fingertip exceptionally well
- If able, try to reduce the finger sausages. Otherwise, use a stylus.
Why should YC change it for everyone to make it more attractive on your device?
I may be upvoting more if the up/down links were below the comment. Usually I don't vote until I read the complete comment, and then, scrolling back up just to vote and then back to continue reading feels tedious. But maybe that's the whole point.
But I still end up in Telegram because of thumbnails.