The Renaissance papacy was not as neat and tidy as you think it may have been, it had quite a few problems of its own.
First, many popes were engaged with nepotism, the favoring of your relatives and appointing them to church offices. Other popes did not abide the rule of having no children.
Secondly, the popes had many distractions whether they were of war, peace, art, or literature.
Thirdly, while the popes had to deal with situations during the Renaissance the protestant reformation was growing.
Though the popes during the Renaissance weren’t all perfect there were still a few who were truly good hearted.