Break problems

I have two new calipers in the front an also replaced the master cylinder I've bled all 4 calipers and bench bled the master cylinder I dnt see any leaks anywhere yet the pedal still goes to the floor after a couple pumps it tightens up then wait a second an it goes right to the floor again and the breaks dnt work

My car has 165000 miles.
My car has an automatic transmission.

– Break problems