It's an argument from ignorance salad. You jumped from observations about what "seems" improbable to the conclusion that this mysterious infinite first cause "must" exist. A first cause, moreover, that you defined as something that we can't know anything about (including its existence) and then went on to list its characteristics.
Take away all the ad hoc logical props and what you're left with is basically "I don't know how all this came about, so it must have been caused by something that causes these things".
Take away all the ad hoc logical props and what you're left with is basically "I don't know how all this came about, so it must have been caused by something that causes these things".
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'