Brake pedal still soft

I am not sure what you mean by "kinda bench pressed the master cylinder when it was already installed"

If you replaced the master cylinder, you should bleed each wheel starting with the wheel farthest from the master cylinder first. The key is to do it correctly by either using some kind of vacuum bleeding tool or having a helper pump the brakes for you while you loosen and tighten the bleeder valve.

Once you get the first wheel to flow bubble free, move on to the next one closer to the master cylinder. Make sure you keep the fluid in the reservoir topped off so you don't re-introduce any air by running out of fluid.

I am assuming you know how to properly bleed brakes manually. If that's not the case, you should look it up or open another question.

I'm assuming that you've already changed your brake pads or they're still good?

There are a couple of different issues that could be happening. First,check for any fluid line leaks. You can check this by looking around the brake lines and the brake system components for any dark rust or darker than normal rubber. It's very interesting that you can't seem to get fluid out of system when you bleed.

I do also know that Ford and Mazda collaborated and shared a lot of technology when they made your car, and the Ford Fusions of that generation have issues with a ABS valve staying open and reducing the hydraulic pressure available, so you might want to check that with your mechanic.

Hope this helps!