Found this:
“The main complaint against the lower clergy was their ignorance and inability to do their job properly. The sacraments would be administered to the poor with a chanted rigmarole that must have increased ideas about the Mass being magic and so heightened the superstition of the uneducated; the prayers would be mumbled by a man who had forgotten a Latin he never understood, and the poor might never have received any coherent or intelligent instruction in their faith. The lower clergy’s inadequate education and general unsuitability were ridiculed by leading laymen like Thomas More and Erasmus, while the privileges they could nevertheless claim earned the resentment and hatred of an increasing number of the population.”
http://www.structuralcommunication.org/sc/tudorpeace/sc_tudorpeace_unit4.html
I also found reference to the Council of Trent setting up seminaries to educate monks and priests...so it must have been a problem, although everything I’ve seen indicates it was at its worst in England.
That has always been an issue in every church and every period.