Where did the universe come from? Atheistic origin science has no answer.

[Sword of Christ]

I would say that, if complex life could exist as it did regardless of environment, that would involve complex life being far more complex than it is.

It would likely just be a very simple goo that would cover the whole the universe there would be no need for complexity, diversity or ecosystems if you can just easily survive anywhere at all. Confine the process to specific precisely defined conditions of survival however and that's where the action is.

The fact that the vast majority of the universe is hostile to life is not a good argument that it was designed to spawn life.

Life can only survive where there is liquid water but the requirements beyond that are surprisingly lax through extreme temperatures and toxicity.

And, either way, not one shred of evidence exists to suggest intentional design, so it's just a bald assertion on your part.

If that's what you want to assert. You're still mistaken though.