Dissapointing performance

There's a difference between a plug working, and a plug working correctly. A black plug covered in carbon doesn't work correctly.

Want me to go pull my plugs and show you what plugs look like after idle/low speed situations? I guarantee they look better than yours.
What cam you have and can you use the same plug with 1/4 mile drag racing? I bellieve your plugs can look nice after that kind of drive. There is multiple thing that can affect that.