Who’s to Blame for What we saw today

He did great given that horrid OL in front of him. This loss is on the OL. Its been bad from the start and today it caught up with them. Unfortunately, it cost us our starting QB as well as a game. My question is why hasn't this been addressed? Because DA doesn't know how?
I think they’ve tried. Penning was a high pick, they drafted Saldiveri. I do question their ability to see good line talent tho, both lines.