This post is on point. I spent a good amount of time working on multiple NativeScript apps (NS with Angular and NS with Vue) and can attest that the documentation is not good enough and that there are serious bugs that are pointed out and never fixed or addressed. I will say that open-source is a good thing to do and that they are not solving an easy problem - developing native mobile apps with multiple JS frameworks…
I stuck my nose into NativeScript years ago and turned right around because of the disconcertingly large gap between the slick experience promised by the project web site and the rough edges reported by people trying to use it.
Presenting your project as a polished solution when it still has a ton of rough edges is not a social norm, an emotional necessity, a human right, a signal of scrappy ambition, or "just what people do." It's a deception that can cause harm. Normally people are not within their rights to demand solutions from open-source projects, but it's fair to ask them to live up to their marketing. They could fix this by rewriting their marketing to better reflect the state of the project, so they attract the right users for the current level of maturity.