first of all: I am new to 3D printing. At home, I use a Creality Ender 3 V3 SE.
My print model looks frayed every time. In addition, the print nozzle rubs against the model during printing. The 3D model itself comes from here: https://www.thingiverse.com/thing:4729762
I know these are the basics and you probably already thought of it, but…
Kind of looks like the printer is moving around a lot. Is it on a solid table? Are all 4 feet making solid contact with the table? Have you run the “input shaping” calibration recently (especially if the printer has been moved around).
From the pics could be overextrusion, that fits in with the nozzle rubbing, when you overextrude each layer is slightly thicker than the printer expects, eventually nozzle hits the print, other things to try : add a little z hop for that, also dry filament, but overextrusion is probably the go, as gozman said, what filament is it?
Hello Andrewson, thank you very much for the link to the Print Quality Troubleshooting Guide. I wasn’t familiar with that site. I use Creality Hyper PLA filament here.