The O-Line has been just fine pass blocking. Whether that is because they throw extra TEs and a RB to chip blocks is fairly irrelevant to Love's inaccuracy. If he has time, which he has, then he should be making pretty decent throws. Now whether they get broken up because the coverage is nuts, is a different story. Statistically, they haven't had a lot of passes broken up though
If we are talking about the offense's overall success/effectiveness then, yah, the O-Line isn't very good.