Why is java so rubbish and used by so many people? Why?

Due to historical reasons, the previous projects were all Java, and the previous Android was developed by Java. Then there is the hot push of training institutions. Look at the elegance and development efficiency of python. It can make Java vomit blood, but it still can't cure Java cancer. The development efficiency of C++ 1 1 can also be comparable to that of Java. I didn't know it could hit thousands of streets. The characteristics of C# language can abuse Java. You must have pointers, generics, linQ, lambda, indexers, iterators and properties. Which implementation is better than Java? Cross-platform and completely object-oriented Java is one of them.