Bulaga is fine. Chargers and SF were the worst performances of the seasons and his main problem in SF was he was on the bench or in the locker room.
Regrading the offensive line in general, it is hard to tell where to place the blame.
1. Most sad to me is how Rodgers is not good reading the blitz anymore. Getting sacked on third down seems to be his most consistent play over the last two years.
2. Wide receivers not getting open forces the line to block longer.
-- There is some discussion that this may be on Rogers too though. Review of the tape has shown over and over again that the younger guys are open and Rodgers just does not see them or just does not pull the trigger.
3. Bad execution and penalties getting the team in 3rd and long puts stress on the line.
4. The play calling adjustments before the snap are hurting and not helping this team. When you are snapping every play with one second on the clock, it is easier for the D to get the jump on the snap.
The offense has been a disorganized mess over the last month. Fixing the fundamentals will make Bulaga and the rest of the line look better.
The first principle is that you must not fool yourself, and you are the easiest person to fool - R. Feynman