The sub plays very weak and it doesn't give punch at all. The master volume is set very low at 35% because it was booming and destroy the sound.
It looks like you have some sort of EQ setting on your sub.
Let us know what type of control you have and what it is set at.
I am thinking things are boomy, so you turn the volume down and don't get much power out of the sub!
The spike you are showing at 35Hz may be a source of the problem.
I might - for a very quick and dirty test - pull the subs away from the wall/corner more into the middle of the room (just a temporary test). Run Audyssey again and see if that improves your sound. If so, that will indicate that your gear is reasonably capable and the problem is setup/location of your sub.