Doesn’t there have to be a structural problem with the pitching?

I know the pitching coach has been around for some successful seasons, but at this point, every single one of our starting pitchers has seen time on the IL (most, a very long time). The staff overall has an ERA over 5, and FIP supports that. The only FIP success stories (better than career average) are Ronel Blanco (3.96), Tayler Scott (3.95), Ryan Pressly (2.13), and Shawn Dubin (2.95).

When everyone is getting hurt or ineffective, doesn’t that suggest there’s a deeper problem here?