How do I Lessen System Storage?

I’ve tried all the common sense stuff - deleting pictures, offloading unused apps, etc. But whenever I delete anything, the space it occupied gets reabsorbed into more used system storage! It just rearranges the maxed out space, doesn’t actually minimize it. I’ve even tried backing it up to iTunes, restoring my device then restored my content without much granted wiggle room.

What can be done to actually fix this catch 22?