Symptoms alone will get you only so far. It's time for a physical inspection.

Properly working brakes will have no:

a. Contamination on the pads and rotor, nor any source for continued contamination of same.

b. Failure of hydraulic parts (leaking or seized calipers, leaking or bulging or collapsed hoses).

c. Hung up sliding mechanisms on the caliper mountings.

If your vehicle does not have all of these characteristics, make it so.