It's been like this since I put it in the ground. A month ago I put a toilet-paper-roll "collar" around the base, but I'm still seeing new damage.
It's inside a CRW cage, so the peafowl (probably) can't peck in this far.
I'm going to go out with a flashlight in a few hours to check for nighttime pests.
My tomatoes are right next to this, and apparently untouched. So it's something that likes peppers but not tomatoes.