You're pissed off because you got hyped up? Don't get hyped up. You're actually pissed off because you didn't like the gameplay? Don't play the game.
If it wasn't hyped up as much people wouldn't be pissed? What company isn't going to hype the crap outta their game, and get magazines, previewers, and gamers hyped up about their game? It's marketing, and Valve did a great job of it. And they don't give a crap if people are pissed as long as their marketing ploy worked and their product sold. And they'll do it again, with their next product, and their next, and next....
Sometimes there's revolutionaries (HL1, C&C, etc) and sometimes there's letdowns (Tiberian Sun, WarCraft 3, etc)... but what a revolution is and what a letdown is is solely based on opinion and personal preference.
[soapbox] We here at HLP have different opinions and different preferences, even when it comes to something like the Freespace series. But that's part of what makes this community great, and I have a dream, and insert some more motivational words of wisdom here to get you all to stop pissing at each other about some different opinions over something as trivial as a computer game. [/soapbox]
Personally, HL2 seemed pretty cool, but I never got very far through it. The load times were a lil' long (and I have a fairly high end machine), and school was going nuts at the time, so I lost time and interest. Haven't really desired to go back.. maybe someday, maybe not. But I bought the game, threw away the receipt, opened it, and installed it, so I deserve to keep it, no matter how crappy Valve or whatever company I bought whatever game from made it. They made it, advertised it, sold it, and I bought it... end of story, sometimes an unfortunate ending, sometimes not.