What needs to be kept in mind is that communication is a two way street, and information needs to be clearly conveyed and also clearly understood. In the case of the Bible, God is clear in His Word. On every point that Christians disagree, God has given a clear answer. The problem is that God is communicating to sinners, and sinners have hearing and understanding problems.
With regard to God’s truth, some things He has revealed are of primary, secondary, or tertiary importance. Some you can be wrong about without serious consequences, and some of which if you’re wrong then you’re not a Christian at all. For example, if you deny the deity of Christ, you cannot be a Christian, so any disagreement there is not amongst Christians.
In short, the problem is not with God or His Word, it is with sinners who by reason of their sinful condition, fail to understand or fail to do what God has made clear.