My ender 3 v2 extruder is crushing the filament and snaps thus the printer fails to print. I have adjusted the extruder tension, nothing has changed. I also upgraded to a 0.6 hardend steel nozzle and I checked if it was the nozzles temperature, that made no difference.
The tension adjustment on that extruder isn’t the greatest and the best fix in the long run would be upgrading it to a better design. But in the mean time, I find there’s sometimes a bit of slop in the extruder mounting to the stepper. If you loosen the screws that secure the extruder to the stepper you may be able to move the extruder assembly in a way that gives the filament more space between the gear mounted to the stepper shaft and the pinching gear on the extruder arm. Yymv, sometimes theres a bit of play and sometimes theres not but it could help.