Sidewinder X4 Pro - dont even know what cause of problem

it appears my model is printing correctly, then the filament stops flowing. I pull the filament out of direct drive with no resistance, but i can feel teeth marks.

The "teeth " marks are probably from the extruder gear that feeds filament into the hot end and unless they are excessive are normal. It might be heat creep that has caused the filament to melt to high up in the extruder and jams it up. All this is based on my complete lack of knowledge about your printer.