"Some prayers or blessings are just a few words saying, 'Thank you. I just want to say thank you,' and nothing else.
In some prayers, I ask for something.
In others I just complain: 'It’s not just, it’s not fair. You dealt with me wrongly.'
All of these are prayers, and they can range from a feeling of bliss to a feeling of extreme anger."
From "The Command is to Hear: An Interview with Rabbi Adin Steinsaltz," in Parabola Magazine.