That isn't misuse, it's how language works. "literally" has been used to mean "figuratively" since at least the 1700s. Insistence to the contrary is a modern prescriptivist meme.
No it isn't. Again, this is just how language works, the meaning of a word is what people decide it is. And if people have been using a word a certain way for several centuries, then that's how it's used. End of story.
This is really very fascinating. I had no idea the public school system had failed so badly. Vocabulary must have been dropped to make room for more social training. You're doing great, though. A shining example!
If you're trying to claim that subjectivity doesn't exist in linguistics I suggest you pick up a book or talk to an actual human. Consult a dictionary. I don't know how to fix whatever you have.
it only matters if you want to take the world 'literally' literally