There is so much mystery about what happened who can say if Crooks was a good shot or a poor one. Yes, he clipped Trump’s ear, and but for a fortuitous turn of his head, it would have been much worse. Still, the bullet had to go somewhere, and he may have just gotten lucky with that one of the six or seven shots he fired.
I’ve wondered that too - where did the other bullets hit. And was Trump hit with the first one or a later one? Regardless - even if Trump was missed by 2 feet, the idea that a shooter could get even get shots off is just terrible and it was a close call.