But if we look at the rest of the data being presented in the figure, it's horribly pixelated at this resolution (10/20)

Let's look at the PDF. Finally, we can zoom in and see the names clearly. Of course, you have to scroll to see much more than the names (9/20)

Alright, Let's print the thing out. Do I need to comment? Good luck reading it, much less scanning up half the page to interpret the data (8/20)

Let's download or open the figure in a new tab. Now we zoom in. There are the names in a somewhat, albeit pixelated text. I've seen worse (7/20)

If you click on the image, you'll get a page with the figure and its caption. You still can't read the names. Zoom in. The caption gets bigger, but the figure stays the same size. (6/20)

Let's say you are one of those special people that reading a web-based version. You can't possibly read those taxa names at the bottom of the figure. Can you? (5/20)