Angry or Determined:

Most everyone has grown up in “determinedly-imperfect churches.” By this I mean that the churches refuse to fix their obvious biblical problems.
I am sure that Martin Luther was bitter and angry toward the Roman Catholic Church for sending scores of people to Hell and not practicing biblical mandates.
Martin Luther was probably angry that he did not grow up in a Reformed Church. He grew up in the Roman Catholic Church and only became a priest because of a lightning storm. He grew up severely disadvantaged in his childhood because of it.
So also, I suppress bitterness because I grew up amidst American churches - where church members don’t love each other, where there is no church discipline, and real discipleship is dead.
Churches are not discipling people because they are not making disciples of Christ. A true church is one in which the members love each other and strive together to glorify God and enjoy Him. We can either be bitter because we have not grown up in a healthy church or we can determine to change things.
I join Luther and desire change.