Obviously, I don't know you or your progression history, but generally, one needs to evaluate past decisions with the information and the situation that existed at that time. Re-evaluating from a standpoint that developed after the fact, therefore, in most cases would not be fair.
After a -12 point change in GD, you are probably now in a better position to assess past actions more clearly, however the model needs to respect that the GD at that time was 11.
Also, in the light of the now -1 GD, there was something about this that made me read it twice:
All the best!
- L.