Lol, don’t feel bad, I have a couple of ender 3s in my mix of printers, and one stopped extruding. I cleaned, then replaced the hot end, then moved on to testing the motor by plugging one of the other motor cables into it. Replaced the motor thinking that was the problem. Nope.
So then the only thing that could be the problem is the control board right? Fine, ordered a replacement and it STILL doesn’t extrude.
……it was the damn cable that goes to the extruder.