IMHO Angular in its recent versions is the most simple front-end framework ever. It's not even JS anymore. It's type script + reactive framework. Those 2 things makes programming extremely easy.
After having dropped Angular in the 1.3.x days, I was pleasantly surprised by how much it's changed. There are still a few mental concepts a new programmer would have to grasp (DI, observables, OO, type-safety) but overall, it's not too bad. I'm not sure I could call it "simple" though. Maybe I'm conflating simple with "easy". I'm of the few that still believe in Redux though. A one-way data flow, a finite state-machine, a new version of the state on every action.... that just defines "simple" to me. (not arguing at all)
All right, my background is 10 years of .NET programming where DI, OOP, type safety are fundamental concepts, so having these things in the front-end framework is extremely helpful.
My point was, angular is emphatically NOT the most simple component option. I, personally, can not think of a single use case where Angular (any version) is a better option than React, Vue or Polymer.