I feel entitled to get a response.
What makes you feel so strongly?
People should always response promptly to my requests.
Well, you should not expect an answer from anyone. It is rude to just assume you will get answers from people, especially if they have no desire to give them.
So it's mean for people to not respond to a message? Well, I'm going to keep doing it.
A lot of it depends on the situation. You shouldn't demand or feel entitled to anything though and just start being more humble.