On the contrary, it is one of the most well-founded theories in all of science, second only to general relativity. If you're worried about the religious implications, you should know that astronomers who embraced it were accused of joining "The First Church of Christ of the Big Bang," because the atheists do not want there to be a beginning point of all things, because that points to a creation, and with a creation, you need a Creator. Which is what Hawking has been fighting against since the 70's.
I'm a Christian, and my God is big enough to have handcrafted a Big Bang. If you're a young-earther, you're going to have problems with a billions-year-old universe anyway.
It’s one of the most well-funded theories, but it’s not well-founded at all. It’s not even internally consistent.