The entire page I'm critiquing is itself a critique of poor methods of communication. That's the only reason I bothered to post a critique at all. If someone's going to post a rant about how people aren't writing their papers well, I definitely see them as fair game for a critique on how they chose to communicate that to the reader.

You can try to equate what I did to someone complaining that some site explaining a math concept breaks their scrolling, or that the color scheme is hard to read on mobile for some game blog, but I think this is different. When the subject matter is communication, and that communication is done in a way which aged very poorly, I think that's worth pointing out. I doubt this person would have submitted a paper with poor font sizing and spacing, because those are fairly well established as to what's acceptable and what isn't, yet they haven't bothered to make sure their own writing doesn't confirm to many other widely accepted sins.

For what it's worth, he has another, newer page at http://people.eecs.berkeley.edu/~jrs/ with links to items as new as in 2021, yet still prominently links this same page and doesn't have any formatting on the rest of their content.

In my eyes, that makes them fair game for criticism of this sort, and I think that also makes it relevant.