You really have to go beyond labeling things to make a good argument. It seemed you were saying that if someone has contradictory impressions of something then that something does not exist. Au contraire.
That is amazing, but let's leave that aside for now. YOu do have contradictory perceptions of things and people. You and a friend describe a certain person. You use different adjectives. There is some overlap, but there are contradictions. Even with yourself you have contradictory perceptions of certain people - sometimes you can become aware of your contradictory perceptions of a person or thing in a crisis or when they let you down, for example, and you realize you never trusted them really, but that was your official story to yourself. If you don't have contradictory perceptions of things then you are different from every single person I have ever met.
I too would doubt that the Bible is a flawless description of God, but that does not mean that there is not something that these people actually did come in contact with and the filters of they cultures and psychologies distorted it.
Exactly like your own contact with other people, for example, is unbelievably affected by your culture and psychology. Still, despite the distortions and failed but perhaps honest attempts to explain something as complicated as a God or another human being, perhaps they got some things right.
You cannot prove something does not exist because people's perceptions of it are flawed.
I understand why you, not having any experience of God, are not convinced by what they say and by their Bible. But your not being convinced is a very different thing from you somehow having proof that God does not exist. Even the Christian one.