AHHHHH I know what it is, the bolded bit tells me. The recommended raiding build is probably not the best when soloing so yeah it is a learn to play issue, learn to play the class don't just blindly follow a website.
I got the mount last week because I came back after an extended break a month ago but I didn't even really start to try for that mount until maybe a couple weeks ago after I got the class hall mount on my DK. That was done within the first month back.
It was piss easy too, do some WQ's every day, kill a bunch of shit, done. I'd love to see the sheer volume of salt that would have poured forth if you had attempted the netherwing grind back in BC.
Edit: I bet you hate getting dazed too.