i'm not senior member. but i'll post anyways
did you get ANY good shaves from them before?
if they came shave ready from reputable honemeisters and you never gotten a good shave with them then it is probably technique. i know when i first started i wanted to blame everything but me (and this may not be your case) but in the end it was me.

if you don't mind, can you describe your attempts to shave, ie pulling, razor burn, nicks, etc