You have only played a couple of games here- neither of which saw that opening configuration.   Please post a game where the strategy was used against you. It will be easier to suggest moves.

The basic solution would be to use your pawns to force an opening in the lines and/or to use the holes that he creates with that formation to post your pieces. (In the diagram you posted, there are "holes" at a4, c4, e4 and g4, any of which will provide a nice home for your knights.)

Perhaps you should take a few chess lessons on understanding the concept of weak and strong squares. There seems to be a Chess Mentor course which will introduce these concepts to you: 

Weak Color Complexes Explained

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by IM David Pruess

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Being sensitive to weak color complexes provides extremely important insight into positional and tactical chess play. It often shapes the entire middlegame struggle, and informs the decisions made as early as the opening phase of the game. Yet many players don't even know what a "weak color complex" is; and many others have heard of it, but partly wonder if it's an artificial abstraction invented by secret grand mages of chess's professional society in order to cloud their art in obscurity.

But weak color complexes most definitely do exist, and-- if you have already acquired some basic calculation skills, and put a serious dent in the frequency of your blunders-- you need to have some idea of what they are in order to get a grasp on the true nature of chess.

This exhortation is followed by an invitation: work your way through the introductory course offered here, and I promise you will:

- Know what a weak color complex is;

- Be able to look at a position and determine whether it has a weak color complex as a feature;

- Know a couple ways to create a weak color complex;

- Know a couple ways to exploit a weak color complex, and the sad sod saddled with it.

Plus, you'll have a better eye for when to look for tactical blows, you'll become wittier, fitter, and smarter!

https://www.chess.com/chessmentor/view_course?id=339

Forget openings. Play normal developening moves and castle. Make sure you don't give away free pieces and capture the ones your opponent will offer you.

Best advice for his this situation.  

Do this against your friends genious opening and you will be fully developed for the middle game and shoot some pawns up and open lines (exhange pawns to activate you developed pieces) .

Put a knight protected by a pawn in  c4, e4 or g4.

Or exchange his light squared bishop for one of your knights, then use your Lsquared bishop to murder him.

And yeah, follow opening principles.

Ok...here it is.  This big secret to defeating this pile of steaming poo.

1. Control the center.

2. Develop your minor pieces toward the center.

3. Castle.

4. Connect your rooks.

Dont spread this secret around.  Its valuable and if it fell into the  wrong hands could destroy chess as we know it.

I dont understand why your rating isnt higher???

b6 followed  by Ba6, exchanging his white-square bishop, then his white  squares will be horribly weak

I like the name "Four Holes Where Black Can Outpost a Knight Variation" better.