I mean I’m not the smartest guy in the room that’s for sure but the rod goes in all the way and comes out all the way when I get to pump it. But after 3 pumps when I say the pedal gets hard, it gets hard while having the pedal and rod all the way out, making it nearly impossible to depress the pedal without using a ton of force. Then it kind of slowly depresses and will have a couple little parts when it jumps down quickly. I’ll video it in a bit if it happens.
I’ve bled the MC multiple times, on the car off the car and with 2 different MCs.
Sounds like you're compensator port is plugged or blocked. If the port is open there is no way for pressure to remain in the circuit as the compensator hole provides a direct path to the atmosphere via the reservoir and vent in the cap. Try to loosen each line and observe which line has pressure on it or if both do. Where there is pressure there is a blocked compensator port. if for some reason the piston is not returning all the way it won't take much to block the port.
I just had a wilwood cylinder with a deformed cup seal (probably caused during assembly) that when it rotated to just the right position hung over the compensator port blocking it. The compensator ports are placed very close to the end of the cup and are very small to minimize the lost travel at the pedal that you feel until the cup passes over the compensator port and begins to build pressure.
A working compensator port can sometimes be observed by looking in the reservoir while the pedal is depressed. Wear safety glasses so if fluid squirts out of the reservoir it doesn't get in your eye. Shine a flashlight in the reservoir and look for the compensator port. Have someone depress the pedal slowly you should see fluid movement out the port as the piston moves toward the port. When the piston arrives at the port covering it up the fluid movement will stop and the pedal will get hard in a properly working system. Another thing that will happen is when you are bleeding brakes and you have air in the system. "Pumping the pedal up" will compress the air in the system and if you release the pedal wth air compressed in the system as the pedal is returned and the piston uncovers the compensator port the pressurized air will push a geyser of fluid out the top of the reservoir. if for some reason the piston is not returning all the way it doesn't take much to block the port.