I think it's mostly the font itself that hurts me. It curls at all the bad places, and somehow I find most characters disproportional; just like the word spacing, which is pretty much random when you switch between styles (italics to maths formula to normal - spacing is all over the place).

The font itself reminds me of the ugly skinny latin fonts you see on Chinese programs, especially when set in italics.

I see that everyone loves LaTeX with virtually no exception - have no idea if it's an acquired taste that everyone gets, or it's my defect for being unable to find any inherent value in it as a reader. In any case, I just don't get it, lol.