Sometimes, I think the problem is that the defensive line is TOO good. There seem to be so many plays where they get so much pressure, so fast, that it opens holes it shouldn't and allows major gains. I also think they tend to blitz the LBs up the middle too much. I realize the line is good and you want to take advantage of that by shooting gaps created by Bennett, etc., but more often than not it seems to allow guys to run the edge and get big gains. Seems to me it would make more sense to just bring the four linemen a little closer together and trust them to hold up the middle as best possible.
I don't go back and watch a lot of film, but it seems to me they give up a lot of substantial runs on plays where the DEs are lined up wide. It could just be Bosa rushing outside when he's supposed to rush inside, but who knows.
I just feel like as much as I love the D-line, they seem to be as responsible for the bad plays as they are for the good ones.