Uh, no. That's pure propaganda. The Dark Ages can be blamed more on the Little Ice Age than anything the Catholic Church did. Also, more people died in Protestant purges than the Inquisition, so if the Catholic "go down" for the Inquisition, than the Protestants go down for their purges.
Are we talking about that period of time when the popes sold indulgences (buy your way into heaven), or the time when those who disagreed with the "church" were drawn and quartered? Or, was it the pope whose idea of nuns were that they were concubines of his...
Oh, I forget. Popes are God's expression on earth! They have the keys to heaven...