Well, first of all, the biggest mistake you can make when facing a sub-par opening is to try to refute it outright. Sub-par is comparable to what? Losing a tempo or two? Or in this case, one slightly less active minor piece. If you're a 2600 GM, go ahead and beat yourself up for not making anything out of it. For the rest of us, just play your regular game. Work hard in each position and do your best. (Most amateurs get at least 1 inactive / poorly placed minor piece even when they're trying their best!) By trying to refute it you'll end up taking big risks and you'll get a worse position.
Secondly, the double finachetto works best when the center is blasted open... I mean that's what the bishops are pointed at right? They're least effective in a locked up, closed center. And when the center is locked, sure, attack on a wing when one of his bishops is guaranteed to be out of the action.
I'm going crazy.
I have a chess.com friend who always plays double fianchettos.
I have read a lot about this opening not being so great, as it gives it's opponents grip on center, and saw that almost none of the GMs play it, but what is the actual refutation for it?
Those damn bishops always tie me up that I have to react to them no matter what pieces I play, black or white. How to neutralize them?
I try to bust open the center but somehow I am just not fast enough.
Further on, situation is made more difficult because he castles after all of the pieces have been developed, so I am forced to choose a side first, which is awful, because I need to castle to the opposite side and pawn storm his castled side.
It's very frustrating knowing that your opponent plays an inferior opening and always gets the better of you.
Also, we are talking about 5/2 chess here.