God is perfect in every way. The idea that God's offspring are inherently bad seems to be a contradiction. Shouldn't His children reflect something of He from whom they came?
A sprout from a seed produced by a fully grown fruit tree is unlikely to immediately produce fruit. All it seems to do is consume and give nothing in return, depriving surrounding plant life of water and nutrients. Yet the sprout has potential to become like that from which it came.
People are not trees. But they are not inherently bad, rather they are born weak, but with potential for great good. Weakness is not evil by itself. But along with weakness, we are born into an ignorant world, where all consequences of every action are not clear. Our own potential and the potential of others seems fuzzy and uncertain. Weakness combined with an unclear view makes sin more enticing than it would otherwise be.
Some are overcome by their own weakness. They decide to give in to the enticement of sin, and they choose the evil path. Though they are beaten, they were not born predestined to be beaten.
We each have the freedom to choose good or evil constantly, every day. Every time we choose good, we grow just a little bit more. Defying our weakness, we can become strong. We can become like Him from Whom we came.