And if so, why exactly? It says it's end-to-end encrypted. The metadata isn't. But what is metadata and is it bad that it's not? Are there any other problematic things?
I think I have a few answers for these questions, but I was wondering if anyone else has good answers/explanations/links to share where I can inform myself more.
...if someone reports them
That means if they want to see your messages they do it anytime, not only when someone report it.
If a government want access to the messages they can access.