That's kinda the point. Generics are mostly a library concern, improving end-user experience and performance. End-user creation of generic types is relatively rare, and you can use them in very simple ways and that's almost always good enough because you don't need them to be maximally correct, only good enough.

For libraries (that adopt generics): yes they can be complicated. But using them is mostly zero-effort and gets rid of a ton of reflection.