The Church was founded by Peter - he was the rock - and went forth as instructed by Christ — why wouldn’t the dark one not attempt to bring in his minions - corrupt The Rock - bring shame and vile into the very Earthly Symbol that connects man to his Savior?
Ask yourself if there’s not one institution that was founded for good - that eventually ended up being infiltrated by evil!
All of this has been and is currently being discussed in Rome - the New Pope was elected for a reason - and these reasons encompass exactly what you are charging The Church for - not the individuals that committed the act and the ones that allowed such acts to continue - a due cleaning is at hand...
The fallen angles still maintain their powers - their knowledge - and their corruption... see this book for a start: http://www.amazon.com/An-Exorcist-Tells-His-Story/dp/0898707102
“The Church was founded by Peter”
No, it was founded by Christ ON Peter the Rock. Peter did not establish the Church. If he did, it would be like any Protestant sect today.