Sunlu Red PETG scarring? : r/FixMyPrint

Can someone help me troubleshoot this scarring my hot end is leaving ? : r/ FixMyPrint

I'm trying to print for 3 days, changed so many settings, it just doesn't work… I'm about to give up : r/FixMyPrint

New with PETG, Any Advice for Quality Improvements? : r/FixMyPrint

SUNLU Upgraded SILK Rainbow(8Meters Color Change Length ) Filament

SUNLU PLA Silk Red Filament 1.75mm 3D Printer Filament Shiny Silk 1.75 PLA Filament 1kg(2.2Lbs)/Spool Red Silk PLA SLUS-SILK-LG-RED-1KG

SUNLU PLA+ 3D Printer Filament 1.75mm,Dimensional Accuracy +/- 0.02 mm,1 kg/Spool,1.75mm PLA Plus,Orange

Is this under extrusion? What could be causing this? eSun PLA+ grey, ender 3 Pro, more info in comments. : r/FixMyPrint

Issues with SUNLU PETG – How do I print this? (Printing help) – Prusa3D Forum

Printer: Ender 3 Pro Print Speed: 40 mm/s Print Height: .28mm Material: CC3D Silk Blue PLA Print Temps: 200C and 60C Retraction: 6.5 mm Layers not fusing properly. Becomes super brittle. What