My facebook app takes forever to load. If I go to Internet and log in it is immediate. What can I do?

That app has been flawed for years. Which is why I stopped using it. Apple will not work to fix an app, that's up to the developers and Facebook is not known for its responsiveness. You could complain to them but I wouldn't hold my breath for anything more than a form auto reply.

The only thing you can really do is find a work around. i use safari to access my facebook. If you don't want to do that then I suggest you look for third party apps to see if any of those work for you.