Buy a food grater. The cheap ones are sheets of stainless steel with a bunch of sharp holes. Cut the flesh into chunks. Push back and forth over the grater (there's a right side and a wrong side). Slow, tedious and it's easy to grate your fingers. Get the coarsest one you can find, and watch your fingers!
Much easier to use a food processor, if you have one.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk