Web components are just a way for developers to build their own HTML elements. They're only a "framework" in as much as the browser is already a framework that wires together the built-in HTML elements.
I don't see any reason to lock away the ability to make nodes that participate in the DOM tree to built-in components only. Every other GUI framework in the world allows developers to make their own nodes, why shouldn't the web?
> too many mechanics and assumptions backed in, rendering them unusable for anything slightly complex.
Do you have any concrete examples there? What "mechanics" are you referring to. Given that very complex apps like Photoshop, Reddit, The Internet Archive, YouTube, The Microsoft App Store, Home Assistant, etc., are built with web components, that would make the claim that they're unusable seem silly.
With your other specific complaints about the community, I think I can guess you are. That person come into our discord server, was so mean and rude to everyone that they had to be told by multiple people to chill out. Had one very specific proposal that when multiple people thought it was a bad idea, threw a fit and said we never listen. You can't just come into a place and behave badly and then blame the community for rejecting you.