Remember Livescript and early web browsers? It was almost cancelled by big tech because Java was supposed to be the cross platform system. The web and Javascript just BARELY escaped a big tech smack down. They stroked the ego of big tech by renaming to Javascript to honor Java. Licked some boots, promised a very mediocre, non threatning UI experience in the browser and big tech allowed it to exist. Then the whole world started using the web/javascript. It caught fire before big tech could extinguish. Java itself got labeled a security threat by Apple/Microsoft for threatening the walled gardens but that's another story.
You may not like browsers but they are the ONLY thing big tech can't extinguish due to ubiquity. Achieving ubiquity is not easy, not even possible for new contenders. Pray to GOD everyday and thank her for giving us the web browser as a feasible cross platform GUI.
Web browser UI available on all devices is not a failure, it's a miracle.
To top it all off, HTML/CSS/Javascript is a pretty good system. The box model of CSS is great for a cross platform design. Things need to work on a massive TV or small screen phone. The open text-based nature is great for catering to screen readers to help the visually impaired.
The latest Wizbang GPU powered UI framework probably forgot about the blind. The latest Wizbang is probably stuck in the days of absolute positioning and non-declarative layouts. And with x,y(z) coords. It may be great for the next-gen 4-D video game, but sucks for general purpose use.
