If these are 1988 predictions given the limitations, how are they a failure? I mean compared to who else who was making projections at the time? As you point out scenario C is on track. In 1988 I assume that climate modeling was much less nuanced. That one of his 1988 scenarios is absolutely compatible with the data is spectacular it seems to me.
By the way Real Climate has updated their model-data comparisons including the Hansen 1988 model, here.

The road of excess leads to the palace of wisdom - William Blake