The Catalan Opening - How do I handle this counter?

As others have said, you are picking an opening that black basically has to allow to happen so learning the QGA lines will be beneficial

They're not talking about the catalan opening, but rather the catalan system; a formation for white like the KIA, london, or stonewall.

Coe at your rating you shouldn't bother with openings.

The fact that after 1.d4 d5 2.c4 dxc4 you don't know what to do means your understanding is very low and studying openings , despite of what you think, isn't going to help you.

   Here is the thing.You try to understand chess and your "teachers"(the people that have answered this thread) are people that don't understand chess.Does that make any sense to you?How can you understand who says nonsense and who doesn't?The only way is to find the answers by yourself and to do that you have to increase your understanding on chess and not on Catalan.Catalan is an advanced opening that should not be played by someone that doesn't yet understand even the basic middlegame concepts. 

    You have started completely wrong.Catalan and Sicilian should be the least of your concerns.From the few games I saw it is obvious that your middlegame understanding is very low and I guess your endgame understanding isn't better.

      Learning Catalan won't help you at all.Find simple openings and start studying endgame and middlegame, and forget openings.You are not going to need them until you are at least at 2000 chess.com rating and they are not going to help you.They only give you the delusion that you know what you do but they actually confuse you even more.

Lol, you can't play chess without.

Yes you can.If you study correctly.

In fact opening is the one thing you don't need at all to play good chess.

Of course he can. All he has to know about opening are three (3) basic principles. If he wants "advanced" opening knowledge, he can learn the whole set of Lasker's tips on opening play from his manual of chess (about one page in total).

The more he knows about openings at his level, the more he gets confused- factly, reading openings could potentially harm his game.

You can't play chess without opening the game. I was just being facetious.

Just for the record the first diagram is not a catalan. It is the fiancheto variation of the kings Indian defence.

What about Queen's Gambit Declined?

accept it,and move ur knight.

its a good move,and takes control of the centre.

either way,u get the centre,so i dont see what to complain about.its simply the queen's gambit accepted

Bf5-e6-c6. Done.

NONE OF THIS IS THE CATALAN!

Why would Black play 3... a6? That is a useless move, without a motive.

1...f5, spoiling your plan 

That variation falls flat on white's face.

1.Nf3 d5 2.c4 e6 3.g3 Nf6 4.Bg2 Be7 5.O-O O-O 6.d4 dxc4

White successfully completes the Catalan opening.

I did not know that the opening posted by the O.P. was called Catalan nine years ago... It's certainly not the case now.

A couple other examples on how to reclaim the pawn 

Here is another way that I often reclaim the pawn and sometimes you can pick up a bishop as well. 

It may not always go that way but that is just a general example and a few scenarios I have actually ran into. You're opponent will often times develop the knight blocking the check but if they don't this can be a pretty dangerous attack. 

So, what kind of crap is that?

On the first one Black can simply pick the d4 pawn with the queen and get a huge advtantage, while in the second he stands absolutely fine after 5...Nc6.