I pretty much live a complaint free life!
I very rarely complain. If life throws me something unpleasant, or when something is not right, I work toward improving it. If it's not improvable, I pray to God that He'll grant me enough grace and courage to accept it. If it's too much for me to bear, I ask God for His help to bear it with me!
I do bring things up to others when I think I need their help to resolve them, I don't just complain to them