Ender 3 underextrusion
The helical exterior is an indicator of a filament diameter mismatch or volumetric mode enabled for linear commands

From ref:


  Then you probably enabled volumetric extrusion by accident.
  
  On LCD go to
  
  
  Control
  Filament
  Disable
  Save EEPROM
  Revert estep cal if applicable.
  
  
  What is it? M200
  
  Its a feature of Marlin firmware which interprets E moves as mm3 instead of linear mm. It is poorly described in the menu, and tends to be enabled by accident.