I think I get the jist of this blog, but there is something that I want to add. This might come as news to many church goers, but the issue that annoys God is when people complain for the sake of complaining without a real desire to find solutions like those Children of Israel who found themselves in the back wilderness.
God actually wants us to come to Him with our complaints, concerns, worries, desires rather than causing discord, confusion, negativity. As long as we let Him know what's on our hearts, then its alright to voice those complaints so that He can give us solutions. This is my own personal experience with complaining. He's not been angry with me for taking it to Him in prayer.