What i honestly think it is(and this is just an observation i see when grouping with other monks) is that almost every single monk is either missing cross class skills, reducing their dps, or simply do NOT do position combat outside of bootshine crit from behind.

This is absolutely insane, the amount of monks that i see that don't stack their dots or refresh them and don't positional combat is far too high. The insane damage potential of twin snakes and snap punch from flank combined with bootshine and true strike from behind is just too much to keep passing up throughout an entire encounter. You should be constantly moving between positions PERIOD. I also see ALOT of monks don't use dragonkick from the flank to debuff the enemy and get the damage bonus. I mean, it's just ridiculous.

This is why so many people think monks are bad DD, it's because they have no idea the true potential of the class.