Except you didn't complain in haste at all in my opinion. Your complaint is valid. Things such as this is what makes for poor gaming experiences. I spent hours trying to do this on two different characters without any youtube or online guides. I found a hidden ore naturally while going through story. Was intrigued. Went from there, was booted from instance on one character towards end...not a big deal, is part of GW2 makeup, restarting long instances because of tiny connection issues...but got to 16th ore finally on another character and was instantly killed and ported to elevevator. Then booted from instance. (got reward for story, did not get the 16th ore.)
Most people do not think this is a fun time. In fact, it is time and money thoroughly wasted.