The existence of Islamic sects discredits the religion as well as the Quran

The fact that Islam split into two sects immediately after Muhammed's passing discredits the religion as well as the Quran because there is no reason that Allah would allow his message to be misinterpreted so completely. The two main sects of Islam, Shias and Sunnis have a completely different interpretation of the Quran and Hadith.

Islam claims that the Quran is the incorruptible word of God and has not been changed since it was revealed to Muhammad. However, the existence of sects that formed as soon as Muhammad died, shows that the Quran/Allah's message aren't as clear. This is functionally the same as the Quran being corrupted, because even if the words are the same as they were 1400 years ago, if the Muslim population is completely split on its interpretation, it makes absolutely no difference.

According to Islam, Allah is all-knowing and all-powerful. He could have literally quite effortlessly crafted a book that was more clear, or could show people when they aren't following Islam properly. But instead, he has done nothing and allowed his book to be widely misinterpreted.

This is not even taking into account all the organizations who have and are using the Quran as inspiration for atrocities and acts of violence. Once again, it makes absolutely no sense whatsoever that Allah is just letting his message be distorted in this way.