Andy, if you don't want to read every page, just go back and read all the posts that the OP made in this thread. It'll give you more clear picture that may influence the way you see this case.
Actually, I'm glad I didn't read the OP's posts (until now), because it probably gave me a more rational opportunity to raise some issues. Yes... I can see how the OP's attitude influenced many who contributed to the thread.
What cannot be assumed is that the OP attended their rescue course with the same attitude. I'd be pissed at losing that amount of money on a course... and if the instructor/center concerned didn't handle it diplomatically then it'd certainly cause some angst. People vent angst... and that's what happened on this thread.
However, even assuming the OP's attitude sucked when she attended the training, there are still standards that have to be adhered to by the instructor. It's not clear whether they were or weren't; but the OP doesn't seem to have been offered any referral or opportunity to 'make up' for not mastering skills at the initial attempt. Also, practice sessions (as the OP describes them) do not seem conducive to skill practice and mastery. The Rescue Exercises are for learning skills, the scenarios are for applying them. Learning should be done under optimal, conducive conditions.
If the OP did display that attitude in class, then the instructor/center may have wished to remove them from training for personal reasons; or to maintain a better learning environment for the rest of the class. If that were true, then the OP didn't "fail" anything... so should have been offered a refund.
There is
no performance standard for attitude or confidence on the rescue diver course. Performance standards are the only means by which the instructor can refuse to certify the student.
There are few performance standards actually listed in relation to specific rescue exercises. The instructor has to demonstrate an appropriate (to the rescuer/victim) technique, the student copies it... performs it. IMHO, it's more about if the student achieves the goal... or not. That depends entirely on whether the instructor has properly trained the student or not.
One important factor in teaching rescue diver courses is that the instructor identifies a workable approach relative to the strengths and weaknesses of the student. An inexperienced instructor might not achieve that... and
could blame the student.
The OP states they were not allowed to progress onto the rescue scenarios. They didn't state they were failed specifically on any given rescue exercise. They did, indeed, complete all the rescue exercises (it looks like?). They shouldn't have progressed through the exercises (it's in standards) unless each subsequent exercise was mastered. So they mastered them?
Advancing onto the rescue scenarios.... well... all they have to do on the scenarios is "participate". So why weren't they allowed to do that?
"
Repeat scenarios as necessary to build confidence, improve rescuer performance..."
PADI Instructor Manual 2014, Rescue Diver Course, Rescue Scenarios