First of all, the idea of a company having a monopoly over it's own products is just ridiculous. That's like saying Coca-cola has a monopoly over Fanta. Of course it does, it owns it. It doesn't have a monopoly over fizzy drinks though.
You seem to think there is something wrong with a company marketing a product heavily. Honestly, I'd never heard of Dragon Age before you mentioned it, I'm not the biggest gamer. I went to Wikipedia and I see it's an RPG. Again, if you don't like it, buy a different game. Skyrim for example, which I have heard of because everyone I know raves about how great it is. As far as I know, they have no link to EA either.
I would argue how is there not consumer choice? "Advertising makes people buy the game". No brick, that's what advertising is there for. People are allowed to buy a crap product if they want. Dragons Age seems to have only got reviews in the 75-85% range anyway, which seems pretty low compared to Skyrims 95%+.
Bottom line is nobody forced these people to buy the game. If EA wants to destroy a presumably solid brand with sub par sequels then theres nothing wrong with that. If people get convinced to buy a sub par product through marketing that thats fine too.
So we have established that EA is not a monopoly, but is 'monopoly-forming' whatever that means. Here's how the free market fixes that.
First off, there is nothing to say any particular developer has to sell to EA. I actually own more Take-Two games than EA: NBA2k12, Borderlands 2, Red Dead Redemption, BioShock. All are sensational games. In fact I bought them because they have come so highly recommended. If EA games are of low quality, people should stop buying them.
I understand your issue with EA, but I don't understand why you have a problem with it. They are buying up a lot of companies and expanding their catalogue of titles, and subsequently producing poor sequels of these titles. The answer is for people to stop buying these sequels, which they will do. The idea that sheer weight of advertising can offset poor quality is nonsense. Of the
top 10 selling games of 2012, as far as I can tell only FIFA13 and Madden13 are EA games, both of which are excellent quality IMO.
Sorry but this is again wrong. I'm sure you would have said the same about Netscape in 1995 when it had an over 90% market share of web browsers. Then IE came along and won a similar 90% market share for a few years. Then people realised they could make a better web browser than IE, and Firefox, Chrome and Opera came along and demolished IE's market share with superior products. In fact, the same probably could have been said about Yahoo when Google Search first started, they dominated the market but Google came along with a superior product.
I don't think you understand what a monopoly is. A monopoly is having no competition. Google clearly has competition in the likes of Yahoo and Bing so there is no monopoly. They are simply giving a better service to people. People can use Yahoo or Bing if they want but they don't. Why? Because they like using Google.
Having a large market share because people choose to use your service over another is not the same as having a monopoly. It's giving the consumer what they want.
You're argument is completely flawed because it assumes that the competition wants to sell to the bigger corporation. Look at Activision, they are making money hand over fist with the Call of Duty franchise. Why would they want to sell to EA? In fact, in terms of software revenues Nintendo and Activision both have higher revenues than your EA 'monopoly'.
And lets take a step on and say you're right. Let's say a company buys out all competition and has 100% of the market share with a poor product. What happens then is you get new companies forming with superior products, as was the case with Firefox vs IE in the early 2000s. If EA owned every game and produced only crap, another company would see an opportunity for profit and win their own market share. That's how the free market prevents monopolies.