Not sure why you're attacking Corder when they're only trying to help you.
I'm not sure what you expect anyone to do about this, since
nobody
gets special treatment. RNG either failed you or you had the shard and just didn't notice. (the Dungeoneering shard gets sent straight to the wise old man for you to collect after completing the floor. (this happened in my experience at least.)
Either way, attacking people within your own thread certainly wont help you.
It comes down to how often you train, and what your RNG was/is. I never got my 8th shard, so I just bought it on the GE. They didn't want to make it super easy to obtain, since it's a rare after all. Agility courses, small DG rooms, Barbarian fishing, and safecracking were the best routes to go per my understanding. If you've got 500M laying around, grab one before it's too late. If not, sorry.