I'd argue that inheritance and mixin patterns are both things you should stay away from, whether it's Angular, React, or whatever, they have proven to be poor patterns IMO and it is simple enough to create reusable abstractions without relying on those.

Code reuse is fine with Angular in my experience - it has been 2.5 years since I last used it though, as I have been working with React in that time and my frustrations about certain aspects of using React & the community has me in a the grass is greener on the other side sort of mindset from time to time, although I know things are not perfect with Angular either (I have some complaints there too).

I've basically learned to accept that using off the shelf libraries come with tradeoffs that you just have to accept as a dev.