What is an instructor???...............simply someone who imparts knowledge that he/she was shown/taught in the first place. It's 'how' they impart that shown knowledge is where the difference lies. You don't have to be a rocket scientest to be an instructor just someone who can at the time jump thru all the hoops. It's when they are let loose without supervision that they devolope an individual style/personality, again good or bad.
Most in here have seen all types of instructors, good & bad. Like all things in life, if you don't like what yr getting esspcially if yr paying for it then simply choose again !
CW