Everyday someone asks a DG to be nerfed, gzzz.
My advice: if u think any DG is OP, pick him, win 100% of the games and be "king of the hill", that way you will prove a DG is OP, and everyone else will play that DG and GPG will nerf the said DG, otherwise is just a poor statement.
I remember when I played L5R (card game) there was a guy that had a great ability to create decks, he created a deck, didn't posted online but asked the company to nerf a card that was creating some imabalanced stuff. He wasn't heard, so he shared the info with 5 buddies and went to play some Koteis (tournaments that happens once a yyear, there are 50 Koteis a year in a 3-month period across the world). This 6 guys or so won every Kotei they attended. The deck licked out, everyone began to play, and win stuff. Finally the company nerfed a card or two. Thats a good way to prove your point 
One thing tho, in a 1v1 match sila has the upperhand at winning, but you have to play it well.