The Church is not a human institution. The minute you start talking about the Church as a human institution you have already missed the boat.  Given what it have said, it is no wonder that you think the Church has strayed very far from the original intend of the founder.  If you believe the Church is a human institution, run by human beings without a divine mandate and calling to do their job, it follows you would think the teachings are fluid--changeable depending on what the modern climate demands.  

I believe the Church is a divine institution run by sinful men who nevertheless have been given a divine mandate and calling.  Their authority does not depend on their moral worthiness or elitist academic credentials.  Their authority depends on their ordination. Consequently, when they teach, their teaching is correct.  When something is defined, it is not open to change. Church teaching stands independent of the trends and whims of pop culture.