Help-Brake bleeding failure

I’ve always started by gravity bleeding first. Assuming the master had been bled properly, remove the master cylinder cover and fill it to the top. Leave the cover off, open all the bleeders and wait for fluid to start dripping from bleeders keeping an eye on the fluid in the master keep it to the top. Close the bleeders when there is a constant drip of fluid. This could take a minute or an hour. Once they’re all closed (don’t forget to put the cover back on the master cylinder) then you can bleed with pedal pressure. I’m sure folks have different ideas, this way has been my preferred method for many years. Good luck.