I don't think it was *as* bad as people are saying. The interior is the weak part, for sure, but I would give them a D+ for the game, maybe even a C-.
There were a few brutal mistakes for sure. Both sacks were on them, as was the batted pass on third and goal
A few plays they got blamed for by fans weren't on them, like the FB whiffing a block on a blitzing DB, or Williams picking the wrong arm slot when faced with a DL on a screen
The percentage of acceptable pockets was about average overall, and the running game got going in the second half.
Just like Williams' stat line would look better if other people hadn't screwed up, the offensive line wouldn't be getting this much heat if other people had done their jobs.