@Jeager makes some really great points. Especially on the kerning issue. Unfortunately, this isn’t one you can fix via negative letter-spacing. And I would honestly not waste time using a JS script to force it.
Edit: Also, the line-height on the paragraph text under the 3 tech sections (Modern, Compatible, Mobile) is a bit too much.
Click to see large versionAbove, I removed the gray backgrounds on the site. I think it significantly improves it overall. In fact, this sort of makes me want to procrastinate on my own and help you with yours. Ha. But to make it work, you still need to do some work.