> Web Components have too many mechanics and assumptions backed in, rendering them unusable for anything slightly complex. These are incredible hard to use and full of edge cases. such ElementInternals (forms), accessibility, half-style-encapsulation, state sharing, and so on.

You could say the same about the DOM itself. That’s why frameworks were created in the first place. The Custom Element API is complex. The DOM is complex. It’s just that we’re used to the latter and not the former.