I thought K&R2 was pretty easy to read and understand, hardly, "painful and difficult".
By today's standards, it does have a few fairly academic examples (if I wanted to convert fahrenheit to celsius, I would use google), but otherwise it has excellent examples of functional code written in a concise style to clearly demonstrate how to use the language to get things done.
The author mainly seems to be implying that K&R2 is "totally not related to what [the author is] doing right now as a programmer in some company."