Ford Escape 2001 Brakes are soft?

I have a Ford ecape 2001 with a soft brake issue.
The system has been bleed though with fresh fluid, the reservoir is full and there's no leak in the system.

I have replaced one of the front calipers, the read drums, the master cylinder and the booster but i can still push the brake all the way to the floor and get very little braking force.

The flexible hoses at each wheel look in resonable condition as well.

Any thoughs on what could be the reason would be really appriciated.

Takes two people to bleed the brakes properly.

one person under the car making sure that at least 4 pumps of the foot makes sure there are no air bubbles in the fluid coming out of the bleed screw. Tell the person in the driver seat when to stop and start.

have you used 2 people for this process?

if not, you may still have air in the lines.

Generally speaking if you're sure there's no leaks and the reservoir remains full the probable cause is a bi-passing master cylinder. The seals in the master weaken and allow the fluid to slip by inside the cylinder instead of being forced out to the calipers or wheel cylinders. The cure is a new one.

Another possibility is a leaking vacuum booster but the master is more likely.