Praise be to Allah, and peace and blessings be upon the Messenger of Allah. To proceed:
What happened to you is not because the arguments themselves are necessarily powerful, but because of an incorrect way of dealing with them. Many people approach major issues of Islamic creed without first building a solid foundation of knowledge, so they become influenced by what they hear before acquiring the tools needed to understand and respond.
One common mistake is to begin reading or watching arguments and doubts before learning the fundamentals of Islamic creed and its evidences. A person moves from one video, article, or debate to another without a clear methodology.
This is like a student who has never studied medicine or engineering and then starts reading the most advanced topics in those fields. The result is confusion and uncertainty.
Like every other field of knowledge, Islamic creed requires gradual and systematic learning, not random exposure to everything published on the Internet.
No. Many arguments are based on incomplete information or logical fallacies, and scholars have answered them throughout Islamic history and in modern times.
Likewise, the existence of people who remain atheists does not mean they possess stronger evidence. Many thinkers, scientists, and philosophers abandoned atheism after sincere research and reflection, acknowledging the existence of the Creator.
Truth is not determined by the number of its followers, but by the strength of its evidence.
Yes. Allah is the Creator of everything, and everything in the universe exists only because He created it.
Allah says:
"Allah is the Creator of all things."
And He also says:
"He created everything."
Matter, energy, time, and space are all creations of Allah. Neither the Qur'an nor the Sunnah indicates that matter is eternal. Rather, the revealed texts clearly state that Allah is the Originator and Creator of everything besides Himself.
If you find that doubts are beginning to affect your heart, the remedy is to return to the sources of faith, not to increase your exposure to those who spread doubts.
Among the most important steps are:
Among the chapters that contain abundant proofs of Allah's power and oneness, and whose reflection strengthens faith, are:
These chapters contain profound rational and universal signs that strengthen faith and increase certainty.
Most doubts do not affect people because of their intrinsic strength, but because they are approached without knowledge or a sound methodology. The path to certainty is not found in immersing oneself in the content of skeptics, but in learning Islamic creed from authentic sources, reflecting upon the Qur'an, consulting knowledgeable scholars, and remaining certain that Allah is the Creator of everything and that the questions raised by atheists have been addressed by scholars throughout the centuries.
And Allah knows best.