The line hasn't been stellar, but it isn't like it has been atrocious either. Their sack percentage is only 20th in the league. Love has been pressured on 21% of drop backs...which really isn't that terrible, good for 20th in the league. His 11 hits while passing is 10th lowest in the league. He has been blitzed the 3rd lowest amount in the NFL.
It doesn't excuse pacing the NFL's worst completion percentage by 4%, being tied for second in INTs, second worst bad throw %, and 8th worst on-target throw percentage.
The one thing actually going against him is the fact his running game doesn't exist, so they don't really have to invest much thought in stopping the run. That really isn't going to do Jordan Love many favors trying to find guys open. However, the fact he has terrible accuracy also is a solid reason they don't blitz him. Why do him any favors and potentially leave a guy open? He isn't going to thread the needle and actually hit his WRs on the numbers.