I wish someone would have told me or gave me a hint many years ago that the 1914 teaching contains contradictions.
By just reading Jeremiah 25:12 it became immediately clear to me that the 70 years must have been fulfilled before the king was killed in 539. A king cannot be punished when he is already dead in 537, children can see this.
And from that on the list of contradictions I recognized just kept growing. It bothers me that I believed this and never took a close look at it.