I'll grant you that some CFIs are poor at their craft. And that number is alarmingly large. But, I won't say that it's most of the CFI population. You generalized a large portion of the entire CFI population and I tried to point out that that isn't fair. Most CFIs are excellent at what they do and they provide a rigorous course to their trainees. Disagree if you like.
You assumed that generalization. I didn't say "all". Therein lies the problem. As you admit, the number of bad CFI's is alarmingly large. Meaning that a large number of them "passed as a CFI." And that is what I said. That's a reflection on the system, and not the good CFI's. I will agree that some are excellent. I wish most were. If most were, excellence would be average. That would be awesome. And this discussion would never have happened.
The point here is that at least four CFI's saw obviously bad flying. Not only did they not fix it, they often exacerbated it, and they also failed to report it. Worse still, in 400 flying and training hours (most of her videos featured a CFI), she got precious little good training. If she had 6 CFI's, and I think the number is 5-6, and 4 failed that badly, those odds are horrific. That number should scare anyone who flies, or wants to, and piss them off.
I love aircraft. I like to see them flying. Or on display. I've seen far too many, in person, lying in pieces, with bodies in and around them. Too often easily preventable. And I'm not saying that CFI's are the only problem. Complacency and hubris are big factors.
See, I do not take people calling out a profession as an insult, even when the profession is my own. When people say that mechanics are bad, I agree. And I'm not offended by it. Why? Because I know they're bad. I clean up after them. I see the damage they do. It was the same when I was an electrician. And when I drove a truck. And when I was in law enforcement. The bad ones make everything extremely difficult for the rest. I want them called out. Consistently. Constantly. I taught/trained in those professions. And I had no problem being the jerk that washed out the ones who could not or would not get it. I hope I made a difference. I wish that I could be sure that I never let any bad ones slip through.