Hi Kubota1,
Hard to tell with just that fig.
In June, mâle trees make pollen, so you should look at those figs to know if this is a mâle tree.
If that fig has consistently a bad taste, then it can be referred to as a caprifig - figs for animals such as goats ...
If the figs do drop, this means whether that this is a fig requiring pollination or that the conditions of growth are too short for that tree - laking space, sun, water, nutrients, heat, long hot season, too cold spring ...
It could be a bad strain. I have two trees on trial and I may well light some fire with them - on one I have figs and if they are as caprifig as they were in July, it will get droped off !
As for the blue line in the fig, - see my post on brebas of Dalmatie- The brebas on my Dalmatie had that blue line, so basically, this means nothing.