Any chance you could take a screenshot of what your seeing?

I don't think it's a rendering issue, but sure: https://postimg.cc/ygsNzMhX

I looked into the CSS and removing the "line-height:1.15" makes it massively more readable for me personally. I have no idea about any science of human perception but I think the font is too "dense" with that reduced line spacing. (It's hard to self-observe this but I believe my eyes are slipping off between lines. Character width might be a factor too.)

(To clarify, my issue is with the main text itself, not code blocks.)