I don't believe you can blame Forte's performance on the OL.
He doesn't look like the same back this year. His 2nd gear hasn't turned up once. In the passing game, he's not getting separation when he is called on. He is extremely tentative at the LOS and is not hitting the holes hard at all. He constantly misses cut back opportunities and seems to be struggling with his vision.
I have no idea what is going on with him but he is a huge disappointment to me this season.