Big Al Macs could be an individual with a unique identity. Maybe he's someone who has done something extraordinary in his field, whether it's in art, sports, or business. Without more context, it's hard to say exactly who he is, but he's clearly the central figure in this 'big story'.
I'm not entirely sure specifically what 'regulus abuse fanfiction' is about as it could vary greatly. It might involve creating fictional stories about a character named Regulus facing some form of abuse within the realm of fan - created content. However, without more context, it's hard to be more precise.
Well, it depends on what you mean by 'real'. If you're asking if it's based on actual events, then it's a fictionalized account with some elements inspired by real life.
It depends on how you define 'true'. Some elements might be inspired by real events or people, but it's likely a fictionalized account with creative liberties taken.