I have an Ender 3 Pro as first 3d printer. Ive only purchased PLA for it with 4 of the 5 roll purchased were Polaroid and some off beet brand of ebay If Ive ever had any issues with a print, it was the printer. Bed out of level, not sticking, not the filament. Until now, Ive printed few things with RED polaroid filament no problem. This last print Ive been working is putting up a fight. I call it a dirty print as shown in picture. Never had anything like this before.It must be in the settings of cura 4.1,4.4.and 4.5, they all did it. Im just right now "mudiling" thru trying to get this 25 hour print finished. Then some upgrade to extruder and hot end in store