From what I read on pprune, the offender did a little more than the usual to draw ire. Something along the lines of making 3 calls per leg, using every taxiway there was, and remaining on 14 instead of expediting his crossing of it despite being asked.
This was from the pilot who had to go around.
Even if all this were true, the bad part was the immediate jump to "all RA pilots are badly trained". As has been stated, and is my experience, there are good and bad in all walks of flying.
The other interesting thread on pprune regarding this topic and Bundy was about Garry Morgan's crash. That was trotted out as another example of poor RA training.
As far as I know, Garry was GA trained, and GFA before that. Regardless, he now has thousands of hours experience and an instructor rating. He readily admits he stuffed up and should have gone around. We all make mistakes. Reading the pprune thread (which had to be closed it got so bad), only RA pilots make mistakes.