There was life on earth LONG before there was breathable oxygen.<quoted text>
Ok, one example: The fact that the oxygen level in our atmosphere is precisely right for life. That speaks of intent and intent can only come from intellect, hence the Creator.
Gradually, because of natural events, oxygen began to be processed by a growing plant kingdom, and along with that, the the life that was evolving developed the ability to breathe that oxygen.
There is no need to assume intent and no need to invoke an intellect behind it.
Science tells us that 99% of all the species that have ever lived have gone extinct. Should we "assume intent" behind that and conclude that your God is a bumbling idiot who can't get anything right?