The way they talk about it makes it sound like they invented the written word, but that notwithstanding the fonts actually look really nice in my opinion.
With Comic Sans I can maybe buy that claim; it was never hard to read, people just think it looks silly (especially in more official contexts.)
At least to me Radon, however, actually is hard to read. I don’t know if it’s my slight dyslexia, but it feels like it’s purposefully doing the opposite of what the fonts like Comic Sans etc. did. It’s not quite Tengwar-bad but it’s still a bit of a jagged easily-confused mess that’s noticeably slower to read