You are, of course, free to take Genesis however you like. But some people believe in the evidence that the earth is older than a few thousand years and that life as we see it today emerged not in a matter of days but over millions of years. Yet, they don't believe that makes God a liar. The Bible is full of parables and figurative language and some people simply don't believe in a literal interpretation.
Why can't God's evidence in the world we see simply be accepted at its face value?
Genesis does not necessarily indicate that the earth is only a few thousand years old. Gen 1:1 states that in the beginning, God created the heavens and the earth. This could indeed hve been innumerable years ago. Gen 1:2 implies that something catastrophic had taken place, for the earth had become waste and void. Gen 1:3 starts yet another epoch, where God moves to refashion the earth. The verbs used in Gen 1:3 and following indicate working with previously existing materials (made, formed, set, etc.) as opposed to the verb "created" in Gen 1:1 which literally means to create ex nihilo - out of nothing.