No, that’s not how art works. Tell Julian Schnabel his work is derivative of someone else’s and see if he likes that accusation.
There’s taking inspiration and then there’s basically copying another movie. Nolan used the movie Heat as inspiration for Dark Knight, but it certainly didn’t feel like he was copying it.
The King of Comedy is about a failed stand up comedian who tries to get the attention of someone more successful, and taking it too far. Throw in a little Taxi Driver, and you basically have the plot of this movie.
Yes Joaquin looks like he did a good job with it. And maybe it’s well executed. But I fail to see how this is groundbreaking or original.