With this, you have completely destroyed your previous argument that Fed has not declined.
But why am I even responding to a troll?
Now as much as you like yourself to believe but there is not just one aspect to it.
Consistency on a Tour and having the peak game for certain matches. Federer would have lost the consistency but he still has the peak game which he plays at certain stages.
There were a lot of players who declined consistently on the Tour and lost their peak game as well. McEnroe,Edberg,Becker were all of those kind.
Then there was Sampras who declined somewhat on the Tour but he still had his peak game intact.