Classic example of center control leading to an elementary win.

Despite the many blunders, yes.

Well, the double fianchetto was probably not the main problem here.

ha...agreed

"double fianchetto is considered bad", well it depends on the position, the main reason it is not so good is because it gives up the center and if the center ever becomes locked the bishop scope becomes horrible, but there are openings that do a double fianchetto. (We generally move our bishops based on the pawn structure)

The double-fianchetto can be a very clever ''feint''. (if the game doesn't become totally pawn-locked in centre:)