Martin luther was primarily dissatisfied with the roman catholic church because he

Martin Luther was primarily dissatisfied with the Roman Catholic Church because he did no longer (or never did) agree with whats called "The sales of  indulgences" 

The sales of indulgences is a form of payment for punishment in the Catholic Church, which Martin Luther did not agree with. 

Also adding on that they did this because they sinned, and this was there act of doing from it. ^

One reason in which Martin Luther King was unsatisfied with the Roman Catholic Church was because of the excessive jubilance of wordy desires exhibited. They were all acquisitive and decided to just buy themselves whatever they had wanted. The Catholic Church at that time seemed to care more about adornment, and wordy riches then that of actually worshiping God. This is just one of the many reasons, but one, readily recorded and emphasized in history.