Unless I read and interpret things differently, it seems to have strong points. I'll add many things in the bible I don't agree with, but the bible is a collection of books. Genesis however, does seem to have strong points.
Now to make sure I'm reading as closely to what is written in Genesis, I look at this hebrew interlinear, because english translating and rearranging of words can change it. http://www.scripture4all.org/OnlineInterlinear/OTpdf/gen1.pdf
So here is why I think Genesis has some strong points.
Genesis 1:1 states how the earth was vacany and chaos and is generally translated to being without form and void. The wording of it to me describes the birth of a planet, a cloud of dust.
Now the next part many claim proves it's all crap because it says light and darkness came and he made day and night BEFORE the sun and moon. That is because you aren't reading what it says. It doesn't claim the light is from the sun and that day and night are the result of the sun. (it claims the opposite later on, that the sun and moon are to SHOW or mark when it's day and night).
But back to the topic, the heavens and earth. What light is can be debated, if it's light from the other stars then speed of light can mean by this point the light has reached earth.
Next it says all the waters are moved to one place and dry land appears. To me that wording seems to imply one landmass. And it appears that at one point all of Earth's dry land was in one big landmass.
Next is says the seeds for plants are created, not full grown plants out of nowhere but seeds. This is confirmed in Gen 2:5 that explicitly states that all plants originated by seeds. The ground was seeded. I'll also remind that Genesis was NOT written in chapters and verses, but one big letter. Chapters and verses were inserted much later on. At Genesis chap 2:3 ends what was discussed starting in Gen 1:1, in Gen 2:4 it's a new topic, "The generations of the heaven and the earth", so when vs 4 says no plants yet, then vs 5 is talking about man, that's not saying that in the day God made seeds he also made man. (I've seen that mentioned and those people are assuming what is NOT stated).
Back to Genesis, after the seeds are made, then the sun comes. (no animals or water life yet because it would have been impossible. It's interesting how separated plants and then life is. It makes sense because before any plants there was no oxygen. Also the seeds needed sunlight, photosynthesis, so during this period of time the atmosphere and water is getting pumped with oxygen.
It's also interesting that recent studies have shown that some water on the Earth is OLDER than the sun. http://www.astronomy.com/news/2014/09/earths-water-is-older-than-the-sun Anyway after plants and sunlight THEN the first life mentioned is aquatic. Then birds and mammals.
Then man is last. Science has shown man was a late development.
Now if you ignore that a creator is responsible for everything in Genesis, with the description and order of things, what is wrong about it?