I'm 55 years old and I expect baristas and anyone else taking my order to speak up. Its hard to hear them sometimes.
Why do you expect of baristas?
I pay her to listen to stupid orders, so I've got no respect for her if she doesn't do it.
It can be frustrating when people who are waiting on you don't do what you want, but you can't force them. You can talk to their manager if you have a problem or go somewhere else.
I can go out and hire people to destroy the shop and kill the barista with a gun.
Thats an insane overreaction. Hiring someone to kill the barista and destroying their shop will surely get you into legal trouble and land you in jail. Instead of going that far why not just leave a bad review and never visit that shop again like a sane person would do?