Why is there a narrative that the OLine is horrible?

[THE PISTONS]

I keep reading over and over people say the line is horrible.

Let's examine:
-Volson has played well according to PFF.
- Collins and Williams have been good in previous years and are in their prime. They went against 2 top 5 edge rushers week 1.
-Karras and Cappa are solid.

There's also stats that shows Mixon gets less yardage than is blocked for.

We also see stats that show some sacks are on Burrow. It's his playing style.