I want to start with a caveat -- I wasn't there, I don't know what was going on, and I don't have anything but your words here to put some pieces together... Don't view this as an attack on you, so much an observation or perhaps a different perspective based on what you've posted. (Yep, that means it may well feel like an attack.)
You're a new student in the class -- but have a base of other experience to draw on. They're teaching a particular move. Not every student in the class has that base of experience. When a technique is first presented -- it's often presented rather unrealistically, and practiced at first in an unrealistic manner. It's possible that the apparent lesson isn't even what the instructor wants the students to get out of it... (I could see, for example, using this particular technique, if I understand it properly, to show some things about leverage and the mechanics of a throw...) So, you proceed to "attack realistically" and your training partner can't make it work. He's missed out on the lesson -- in fact, he's been robbed of the lesson of the day, and been taught instead that it doesn't work. I'll add this on the issue of correction... The worst sign from my teacher is silence. He doesn't tell you you're wrong. He doesn't tell you you're right. He just lets you go. I LOVE being corrected -- because it tells me he still cares whether I'm learning. I've seen him teach seminars, and, at first, wondered why he let some people roll through, doing things that weren't even close to what he was trying to teach. It took me a while to realize that he knew that there's no point in correcting some people -- they simply won't listen.
It can be really hard to step back, and simply do what you're told when you're used to being the front. At the same time -- it's an exercise I encourage people to do. It can be a great grounding experience... and a reminder of our own limits.