The Catholic Church does not defeat the purpose of religion, it is one of the greatest charities in the world. It clothes, feeds, educates and cures millions. How it becomes divisive, is somewhat puzzling. Unless, of course, if you believe that the Church should roll over and play dead on issues such as abortion, homosexuality, extra and premarital sex... then, yes, it is divisive. Just as Christ was divisive ("because of me, father shall turn against son, husband against wife...."). The early Church was definitely a pain in the side to the Romans, that was divisive, too.
Rigid... I like that. If only the Catholic Church had been more flexible during the time of Nero, Diocletian and some of the other Roman Emperors, we'd be worshipping Jupiter, Venus and the rest of the pantheon of Roman Gods. So should they accommodate the conviction of the day? The Church exists to preserve orthodoxy and to be Christ's presence on Earth. It was placed here to win popularity contests (which it hasn't).
Saints, by the way, originally meant those who were members of the Church. To become a saint, you must have lived a life that was beyond reproach. Saints are not named willy nilly, it takes years, even decades for someone to become a saint. There is a great deal of research into the candidate's life. Plus at least two miracles that are associated with that person must have taken place.
Of course, when you consider that the Catholic Church is one of the largest if not the largest charitable organizations in the world (I once read that 25% of the world's AIDS victims are being taken care of by the Church), its shortcomings aren't so bad. Yes, then there was the fact that the Catholic Church helped to defeat communism, because the previous Pope had great sway with the Polish masses, and thus, Solidarity was born, and the Russians didn't dare invade because the Pope was ready to call them on it in public.
So, what's the reason behind having a Pope? Because Christ gave Peter the Keys to the Kingdom of God, then, through Apostolic succession, each of his successors. Some agree, some don't. Still you have to admit, the Pope has a lot of sway, much more than Billy Graham or James Dobson. Millions respect the office, others fear it (consider that Castro declared three days of mourning for the passing of the last pope in Cuba, says something, doesn't it? He in effect was admitting the power of the Papacy.)