I just checked your last java project on github (TopBloc), if you want I can give you an honest code review about it, feel free to ask in private message.
I suggest you to stick on one language (java or C++ or python).
Learn about Unit testing, TDD,...
It's not just about writing lines of code with different syntaxes, I think that's why you receive so manny rejections.
Had the same problem at the beginning of my carreer.
if you choose Java to be your main language, don't hesitate to ask me questions about it :)
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