Martin Luther was frustrated with the Roman Catholic Church for a number of reasons. Let us look at three of the most important of these reasons.
First, and perhaps most importantly, Luther was frustrated with the idea that the rituals and practices of the Church were the way to salvation. Luther came to believe that there was no way that simply following Church rituals could cause someone to deserve salvation. Instead, he came to believe that people could only be saved through their faith and their personal relationship with God.
Second, there was the issue of indulgences. This stemmed in part from Luther’s concern about the idea of being saved by one’s deeds. Luther was even more strongly against the idea that a person could have their sins forgiven based on monetary payments to the Church.
Finally, there was the issue of papal power and the Church hierarchy. Luther came to believe that all people should be able to read about and think about God’s will on their own. They did not need priests and bishops telling them what to believe. Following this line of logic, there was no reason that the pope should be treated as an infallible source of wisdom.
All of these were major reasons why Luther was unhappy with the Roman Catholic Church.