Might as well vent with a punching bag because all of those things will continue to happen. This is inevitable if you continue interacting with other people for anything related to work.
Want peace? Leave the city, move to the jungle and collect berries for breakfast.
I agree with most of those issues. The problem is that most customers are going to be offended way faster than they will be willing to hear your side of the story.
The “hello” and “hi” is quite frequent. My guess is that they want to avoid wasting time typing much more to find out if you are online or not. Thankfully, we do have those handy pre-written messages now. The good old “Hello, how can I help you?” should suffice.
PS: With that said, we can all go back to the joy of the perpetual mouse wheel we call life. Also, try the punching bag, it works!