Yes, it most certainly does challenge God. Either it happened the way we're told it did in scripture, or scripture is a lie and thusly God who inspired it becomes a liar. It is a direct challenge to both the scripture and God. Evidently you know just enough about scripture to be dangerous or a bad liar and I don't know which. As far as the plants predating the sun, that's scripture. I don't pick and choose what scripture to follow.
As far as your commentary on God's magnificence, if you revered it so much, you might have more respect for what is His word. I don't know what group you're pandering for; but, it's not gaining you any credibility with me.
I don't care if I gain credibility with you or not. It is completely immaterial and irrelevant.
I have read the Bible, Koran, Vedas (Hindu, if you don't know) and Dharmapada (Buddhist, for those ignorant). Evolution and Big Bang challenge the first two. Not the last two.
People who are ignorant of ALL religions of the world should either take the trouble to read them, or accept the reality that they ignorant and live in the spiritual darkness of a cave.
Don't confuse "scripture" with "Biblical scripture". There are scriptures in the world that suport evolution and the big bang. Take the reincarnations of Vishnu for example - fish, turtle, boar, small primate, walking primate, man. Get the point?
Just because it is your scripture does not mean it is either right or reality.