Honestly most groups that I see fail to clear stuff like Final Steps of Faith is because of veteran players jumping ship after a wipe or two (or even as soon as they load into the instance....) not new players being unable or unwilling to learn.
This community seems to have a lot of issues with patience.
I personally blame the easiness of a lot of the 2.X trials making players expect Trial Roulette to be 3 minutes of effort for free tomes and as a result becoming intolerant of anything that takes longer.