This sounds like you want to prove something. That you can do it better than the maintainers of the library. That you can solve hard problems on your own instead of relying on other people.
That’s all great and sometimes it’s good to do hard things on your own and make sure you could do it just in case. But it’s not always necessary to do everything yourself and learn every lesson yourself. It’s a valid way to build on knowledge and work of others to achieve your goals.