A book management software to track the books I have borrowed from the libraries in my city by automatically syncing with the library account via the online ca

A book management software to track the books I have borrowed from the libraries in my city by automatically syncing with the library account via the online catalog of the library. It is the worst project ever I am hardly getting any users. The people who go to the library, do not know about my software. The people who randomly find my software, do not go the library in my German city. I tried to add other libraries in other cities, but I cannot really do that without traveling to that city to get a library card there. The librarians refuse to talk about it, because it also warns people about the due dates, and they want people to miss the due dates to raise more late fees. It took like 15h / week for 15 years. It takes a massive amount of time, because every time the library changes their webpage, I need to make an update to read the webpage. Especially since I can only see the change, when I have borrowed a book from them. When they are in other cities, I can spend entire weeks writing mails to the library to ask what they have changed, and not getting any answer But there are still some people using it, otherwise I could have abandoned the project ten years ago. Now I cannot get rid of it