Quietly accepting the abuse, and getting angry are two sides of the same coin, both of which are basically "just embracing the dystopia." Notice that the same people that do the first, will eventually do the second once pushed far enough, with ultimately, the same results.
It's perfectly fine to express displeasure in a calm and collected way, the same way you would patiently correct a child... e.g. "I am really disappointed that ____, can you please ____?" (without being sarcastic or condescending)
But losing your cool doesn't correct anything, it just expresses emotional weakness and makes the person dislike you and not want to help you. Someone customer facing at a place like Google sees angry upset customers all day long, and probably makes fun of them to their friends and family, but doesn't go out of the way to help them.
What they don't often see is people showing strength and calm in the face of this BS. Someone that can endlessly adapt and redirect things back to their own clear goals regardless of what is thrown at them, without even needing to be adversarial. Think Bruce Lee's "Be like water." In most cases, this will be off script for them, and they actually won't know how to deal with that other than giving you what you want.