If you read that twitter stream, to this day Charlie doesn't consider Litecoin a scam.
But often we need to reconsider what the definition of a scam truly is.
I mean, to make Litecoin he literally took a snapshot of the Bitcoin source code, changed like 2 easily-found config parameters, and launched it. And he admitted that it took him all of like a long Saturday to change and test it. He put almost zero effort into creating Litecoin. He created an altcoin of Bitcoin with a few clicks of a mouse. What he did, anyone could literally do with enough knowledge of the code.
So what part about that process and goal isn't scammy?
Methinks you need to ponder upon the definitions of 'open source' and 'permissionless'.