Of course we know that Heracles attack was plot induced and therefore inevitable, but the characters within the story don't.
It's one thing to display strength, but another to say things that are only going to goad you enemy into a fight that you supposedly wish to avoid. So yes, I am criticizing her dialogue.
Hippolyta here is written as jumping straight into declaring that she and the Amazons are going to lead and expects others to follow. That immediately does not propose an alliance of equals. If we are going to use hyperbole, her words boil down you "You're not very clever. I'm much better than you. We should be in charge."
Actually that isn't hyperbole - more like a summation.
That might be how 16th century European conquerors handled a first contact, but if I recall it very rarely led to peaceful coexistence. In fact, never.