You can blame the current meta where several people new to tanking in this game worry about being a dps more...then actually tanking. This whole idea of tanks needing to max out thier dps came from Savage raiding. Where dps is necessary from all classes dps/healer/tank to clear that content. Newer tanks look at that, and try to mimic it, but also forgot about the basic fundamentals of tanking...holding aggro, staying alive, and positioning.

But yeah you had a bad tank player.