The first group do not trust God, but trust in the arm of the flesh. They want a religion that conforms to the fickle moral standards of the world. They want a religion that pleases the flesh. These will never know God unless they learn to trust him and repent.
The second group are interested in God's will. They focus this externally. They want another church, one that conforms to God's word. Unfortunately, all institutions will invariable become corrupted. Religion was never meant to be an institution, but an individual experience. In order to become an institution, the continuous gospel has to be unplugged from God and reduced to a fixed set of rituals. Those that take this path will eventually find all the same problems with their new church that they had with their old church.
The third group are inwardly focused. They want to fix themselves, not erect another institution. They want to conform themselves to the word of God. They tend to see the corruption in any earthly institution, not just their own church sect, and are far less likely to get sucked into another man-made religion.