That's probably true to an extent. People find contradictions in Christianity, that really aren't there. They pull things out of context.
But I think there are Big Obvious contradictions in many of the worlds religions.
What really separates Christianity from almost all of the world's religions. Is that most religions teach that if you are good enough, if your balance of good versus bad is high enough, then you will go to heaven.
Christianity on the otherhand, teaches that any sin makes you unworthy to stand before a perfect holy God who knows no sin. Your only options are to be perfect or to be forgiven. (And since God knows the future and has already announced that none rae perfect, I wouldn't count on doing the first option,)
There is no good that you can do that makes up for having done evil. Because any good that you can do, is only what you should have done in the first place.