You should absolutely publish your code if you want to. Do not bother about what others might think about it.

Most people like to pretend they understand Software Engineering and all their code is designed well but that is far from the truth. Real world products are always messy in the first version. It is only when you start rewriting it that it starts getting better (relatively speaking). What counts primarily is that you finished a product/project to requirements and shipped it; everything else comes later.

This is how all learning and development has been done throughout Human history.