It's not just you: Its typography and design is quite unsuitable to reading. The lines are too long, there is not enough leading, the typeface is badly chosen, and the black blocks everywhere are unpleasant and off putting.
Hey, I'm the author of the blog. I agree with your criticisms - I originally designed the website for dark mode users and hadn't really revisited the styling afterwards. I'll be doing some tweaking to increase readability.