The Black Cauldron.
I just want to point out that the animation on POYW was not anywhere near completed when that film was screened. The scene didn't have the depth it did later on when it was animated. And anyway, he finally did agree to put it in...AND he was directly involved in hiring Howard Ashman (whom the animators rejected at first, since he was a "Broadway" not animation guy) and developing the music with him and Menken. (at least in a "supervising" sort of way.)
Also, you have to remember that this...was....1985!

Things were completely different then as far as media content (live-action and animated, but especially animated) "Cartoons" were seen as invariably chid-friendly. And yes, K later on went to make films more for adults, but this is the point that Disney was pretty much at during this time, as well as animation. It was K that eventually steered it towards a more adult level. (and even on the commentary they say that he told them to make the final confrontation with Ursela scarier, more "Die Hard," and that over and over again he stressed the emotion of the story and at one point said: "I don't believe he loves her, and without a love story you don't have a movie."
Plus, as far as thinking Little Mermaid would basically be aimed at girls...(I know you didn't mention this, but there have been those who brought it up ) back then yes, animation was supposed to be child-safe and was OFTEN aimed at boys OR girls, separately. Of course things have changed since then; in fact it was encouraging the animators to make Beauty and the Beast a good
film, not just an animated movie, that helped it get nominated for Best Picture. (Animators actually laughted when K suggested that they make the film good enough so it had a chance to be nominated for Best Pic.) It's all well and good to say that he should have done this or that...but you can say the same thing to those who made other Disney or even Pixar films. There were probably lots of great scenes that might have helped the films but maybe were too risky or too long. It's how the entertainment business works. You can't damn K without damning everyone else.
He says that TBC is "Way too violent" and seems to believe even today that they should've "Edited" it.
You don't know exactly what he did cut or what it consisted of. Very few people actually do. It might have been disturbing, especially for very small children. (Who are a big part of Disney's target audience) Also, wasn't the film rated PG-13?
Also, it wasn't just the violent stuff, it just didn't flow all that well and was confusing, from what I understand. ( I think that film was actually in production for over a decade!

)
I'm sorry if I jumped too quickly on this, but...I wish people wouldn't villify Jeffrey so much. He's a human being and he's made mistakes....just like John Lassetter has made mistakes, Steve Jobs has made mistakes, and Musker, and Clements. None of these people are perfect but we think of the GOOD they have done, not the dumb things they messed up 20 or so years ago.
I don't know if he has a grudge towards Disney anymore, but it's his business. He has gone out of his way to praise them and to say that he has no regrets about the years he was there.
Hey, maybe he was a bit uncomfortable on camera, but who can blame him? He hasn't
officially associated with or endorsed ANTHING to do with the Walt Disney company for more than a decade!

The company put him through litigation hell for five years. They basically denied his existence in their corporate history for 12 years. I think he might be a
bit uncomfortable after all that.

You can’t just have your characters announce how they feel! That makes me feel angry!