The idea of creating a feedback system is fundamentally very good; I just don't fully understand: simply rating a post as "not good" isn't enough for moderators to pay attention to it.
If that's the case, such comments should be sent to them in private messages.
And the talk about it being "done behind people's backs" and again, just nonsense! If all of this is discussed in the thread, there will be so much off-topic content that no moderator can handle it.
Creating a separate thread and including links to it in posts is certainly possible, but only if someone other than the feedback system monitors that thread.