You mentioned you replaced the brakes yourself, did you lubricate the slides properly, clean the oil off the rotors, and I have seen certain situations where people have gotten the calipers on the car and bolted them but they are not right and making good contact with the rotor, this is usually from inexperience, I would jack up the car take off the wheels grab a long enough stick or bar place it against your driver seat, and get the seat as far forward as you can and have the stick or bar on the brake pedal to apply pressure so you can see how the calipers look with the pads on the rotor. You should never have to go all the way down to the floor to get the car to stop good, so I have reason to believe your calipers are not on right and the pads probably are not making good contact with the rotor, you can probably have one foot on the brake and one on the accelerator pedal and then not be able to keep the car from moving forward that means the calipers are not able to put the pads to the rotor enough to hold it solidly. If the brake pedal was squishy you have a leak or air in there, if it is rock hard the booster has failed or there is no vacuum going to the booster.
These cars are not superior in brake performance under hard driving I can tell you that, but they can and will stop in the state of emergency in normal driving and do it quite well and effectively, changing brake boosters and all that is foolish and time consuming and a headache for nothing as it probably is not even close to being the problem here.
All else fails you can go ceramic which is expensive on Chryslers and will shorten your stopping distance a lot worth it if you want to spend the money, I have always ran semi metallic and never had problems with these LH cars, and mine have never made noise during stopping either if you do a brake job the right way there should be no problems, its when you just swap old parts for new parts, there is more to a brake job than that which is why not everyone that works on cars knows cars and should be servicing them, theres a big difference between paying backyard bob and an ASE certified tech and believe me you are not getting the same quality by far. If you are 100% not sure bring it to a quality shop please and not some joker who tells you he is a mechanic cause nothing on cars is mechanical anymore so no need for a mechanic.