Watchmaker analogy - Wikipedia
Or:
Teleological argument - Wikipedia
So let's boil it down to the simplest form for the discussion. At least to start.
The concept is rather clear:
That which is complex, requires a design, which obviously implies something designed it.
A watch doesn't exist without a designer.
Therefore the Universe couldn't exist without a designer.
First question right from the gate, if you presume the concept has merit, that a design implies a designer, why then jump to the conclusion
(in the case of the universe/life as we know it) that the designer must be one specific "god"? Or any "god"/"gods" at all?
Does the watchmaker analogy (in terms of God/universe/life) hold water, or fall apart rather quickly?