It seems like a lost battle. If a person you don't know well uses literally, you already cannot know without context if they mean figuratively if the fact being qualified is remotely plausible. It's broken beyond repair. No hope for healing. Literally is no more. It's passed on. It has ceased to be. It's expired and has gone to see its maker. It's an ex-word.

Do you know Captain Literally?

https://www.youtube.com/watch?v=9jh4Mpgbi4A