How was the Adhan legislated, and what is the refutation against those who claim that the Messenger of Allah, may Allah bless him and grant him peace, was perplexed in legislating it, and then adopted it based on a dream seen by one of the Companions?

Do not pursue doubts, nor preoccupy yourself with them. Instead, you must seek beneficial knowledge that enables you to worship Allah in a manner that pleases Him. Adhere to the methodology of the Ahl al-Sunnah wa al-Jama'ah, and beware of examining the doubts of atheists, disbelievers, and dissenters. Make your heart like a "solid glass bottle," through which doubts pass over its surface without settling within it.