Negativity happens. The amount you see depends on people's lives. If you spend the majority of your time, say...working a service-desk, tech-support, or cash register? Yeah. You're gonna see people at their worst. In contrast, try a hospital. Yeah, myriad bad things about it, but if you're gonna see people at their best, a hospital tends to be where you find it I think. It's part of the job for a nurse to be kind and encouraging to his or her patients. Nothing brings families and people together better and faster than helping others get better.
Yeah, I suppose that's a bit of a rosy description, but I think you get the idea. Alot of those who ARE cynics (as opposed to those who THINK they are and merely overvalue the few bad things in their life as opposed to the large amount of good things. Or they just think it's cool to be a Cynic.) are forced to see the bad parts of humanity day in and day out. It really does become tough to cling to hope after years of such exposure.
As far as games and gaming companies go, I think it boils down to this:
It's not that they're making money. No one knocks say, Valve, for making an arseload of cash. Why? Because they make GOOD games. What people get their collective undies in a bunch over, what they've REALLY got a problem with when they complain that some company is making money hand over fist for a game, is that they're making it for a game that is simply not worth it.
This comes up for CoD, Twilight, ME 2, anything that's generally considered sub-par or average but makes a hell of a lot of money. It's not that it makes money, it's that it's CRAP and it makes money. It's the disappointment they feel towards the people who PAY the company that money for something that really does not deserve it, when there are dozens, hundreds, THOUSANDS of other, better products out there that they feel actually DESERVES that cash.
This is a good, if different, take on the same kind of concept:
http://www.escapistmagazine.com/videos/view/the-big-picture/3281-The-Numbers
When you see people complain about a game or a company, I think that's mostly what you're seeing. It's not that the company makes bankroll. Everyone I think can agree that people need to feed their families. But to make money, and obscene amounts of it to boot, on a mediocre product is just more than some of the folks here, and in other places on the internet, can stand.