Quick update
I put vacuum on the reservoir, and had a bunch of air bubbles came up. Good news right? Nope,pedal still soft. I pumped it a few times with no improvement. Tried pulling vacuum again, no air came out. In fact I was pulling fluid into the vacuum reservoir. No change in pedal feel.
So I removed the line going to the slave cylinder and plug in with -4 an plug. With the line plugged, I should have firmer pedal, so I thought. Pump the pedal a bunch of time,still no change in pedal feel.
At this point, I’m pretty sure the MC is damaged.