Honestly,
We've all had that time where we've wanted to rise above expectations of others. To prove those who beleived in you right and to look down upon those who harm and doubted you. We've all wanted power in some shape or form. We've all been to the point to where we would do anything to get what i've listed.
With that in mind, do I blame Gul'dan? Quite the contray. I admire him in a way.