You can answer a simple question to determine a shitcoin:
Q: Is your coin Bitcoin?
A: Yes
Result: Not a shitcoin!!
A: Yes, its Bitcoin Cash.
R: SHITCOIN!
A: Yes, its Bitcoin (ABC, XYX, Private, insert your preference here).
R: SHITCOIN!
A: No.
R: SHITCOIN!
It's kind of a fanatic fan that will said other coin as a scam. But i can't understand about that if that guy was taking another coin as a scam because they are all have been using the bitcoin source code to create their own platform. Bitcoin is the best coin right now. jajajajaja