OP does have a point. It feels like an unfortunate combination of multiple things caused this content to suffer, but a lot of it could've been avoided if the dev team were clear on who they want to design it for.

The dev team first introduced chaotic as a harder alliance raid that's aimed to be around the difficulty of an extreme fight, that's what most people would know about it. Then they put widely desirable rewards behind it, which entices more than just the raiding playerbase.

So the end result we have is that people who aren't prepared for anything harder than an extreme fight piling into chaotic and making mistakes that most raiders would avoid making, which frustrates both sides. The raiding side gets frustrated because people are failing mechanics that are commonplace in savage+ and should normally be easily handled while the side that usually only do extreme fights are frustrated because they think the fight is overtuned.

I hope the dev team learns from this and makes it clear who the content is for so that the next piece of content doesn't pit the playerbase against each other and cause frustration again.