Just because A, B, and C were caused by X, doesn't mean that D was caused by X. And likewise, just because A, B, and C were caused at all does not mean that D was caused as well. You yourself make an exception to your own rule when you demand that there must be at least one exception to it, at the start of it, that has always been and was not caused; The First Cause. I admit that I do not know if there was a first cause (and certainly don't know anything about it if there was one - and wouldn't attribute a religion around it or even assume it to be sentient or self aware). I don't see why you can't do the same. Perhaps that is why you are theist and I am atheist.
Because you're assuming that God has a beginning, which God has not.
The criteria for something to have a Creator is:
It must have a beginning.
Logic says that something must've come from somewhere, that everything that came to existence - whatever we see must've come to existence by someone - who doesn't need anyone to exist.
It is pretty logical to me. To me it is innate to believe in a God. you require tangible proof, if you can't see that. Then it is time you open the Quran and ask God to guide you.
There is 3 types of proof for God's existence:
Instinctive proof:
That which we are born with, we are born with the innate belief in God. We recognize our Lord, Allah. But many has been mislead by the Devil.
Tangible proof:
Things around you. Everything that has been created, etc.
There are 3 possibilites:
1. It came from nothing.
2. Made itself.
3. From someone.
1. and 2. is impossible. Cause from nothing, nothing comes. Which leaves the 3. that it must've come from someone.
Shariah Proof:
Revelation from Allah. The Quran.
To assume beforehand that there is no God, just because you can't see Him with your eyes, is arrogance to me.
In the end it is Allah that guides.
Why don't you attempt to search for God? If you say you don't need to, then what will you do when you die and find out that God exists? Allah knows best your heart. Why do you refuse to search? Read the Quran?