It is not hard for me to understand wanting to walk out of any relationship (one’s marriage, one’s job, one’s membership in a church) because of disillusionment, particularly if this has occurred on a personal level. (As opposed to “news stories” or general disappointment in human aspects of church life, and the manifest sin that does occur in the church.) However, there is something beyond the human dimension that is at stake in choosing to end one’s participation in Catholic Church life. One chooses then to deprive oneself of the sacramental life --the most intimate encounter we can have with our Lord before death – all because of bad witnessing by human beings and mistreatment by human beings.
Priests are not the sacraments; they are merely the instruments of those sacraments, regardless of how weak and how much a disappointment any one of them, or many of them, might be. No human being can come between an individual and his or relationship with God. God is absolute, transcending every human relationship and every power to hurt.
The congregation in the pews, regardless of how they also behave (or are presumed to think), are also unable to modify the power of the sacraments.
Romans 8:35-39
*Who shall separate us from the love of Christ? Shall trouble or hardship or persecution or famine or nakedness or danger or sword? …No, in all these things we are more than conquerors through him who loved us. For I am convinced that **neither death nor life, neither angels nor demons, neither the present nor the future, nor any powers, neither height nor depth, nor anything else in all creation, will be able to separate us from the love of God that is in Christ Jesus our Lord. ***
If you are looking to the congregation to be the mirror of divine life and the standard by which you judge your membership in the Catholic Church, you are approaching it backwards. Become yourself the mirror of divine life, by entering into the depths of Our Lord’s Passion and Paschal Mystery, through prayer and sacramental life, and then your mirror will be an irresistible attraction to that congregation, to join with you in that relationship/sacramental life. You will also, by deepening your spirituality, clarify your vision into the goodness of those people in the congregation, and into the neediness of the priest(s).
(When I say “you” I mean “we” in all the above.) It is not so much ignorance about the faith that would allow a person to deprive himself of sacramental life; rather, it is a failure in the theological virtues of faith and hope (the capability of God to transcend fallen nature anywhere). All the intellectual understanding in the world does not in itself increase our faith.
Now, if a Catholic finds the atmosphere in a particular parish – and/or the leadership (or lack thereof) of a particular pastor – so discouraging or scandalous as to present barriers to deepening that faith, then such a Catholic has an option to look at other parishes. But except in extreme cases, most of this is an excuse. For any individual, there are less inspiring parish environments and more inspiring ones, but in all of them Jesus dwells.