What makes it a shitcoin?
I doubt you'd call Bitcoin a shitcoin if Satoshi, Greg and Adam would have added to Bitcoin features that were planned for Bitcoin but only made it into Monero.
Discussion
The same thing that makes every other shitcoin a shitcoin, there can't be two, Bitcoin is harder to create, has the network effect, there is a reason alts don't hold value because the more there are the market gets diluted