I have in fact played both, and I mean obviously i'm not saying Silent Hill 2 is a bad game because like I said something being released quickly (2 years between Silent Hill 1 and 2, 1 less year than it was between Bioshock 1 and 2) isn't a legitimate criticism in 99% of scenarios (The only exception I can think of is L4D1 and L4D2 coming out too close to eachother, voiding L4D1's multiplayer and it's community, but that's a multiplayer thing).
Similarly, Silent Hill 1 left no 'build-up' or really 'opening' for a sequel, being, much like Rapture, this strange desolate world that seemed to have been explored by the end of the 1st game. And yet Silent Hill 2 came out and was frankly amazing. So how Yahtzee, who effing LOVES SH2, can say that Bioshock 2 is bad because of how quickly it was made and how little opening there was for a sequel kinds of confuses me.
Not to be too flamey though, I mean if he don't like the game he don't like the game, but those are kind of bullshit criticisms, and I think we all know Bioshock 2 is FAR from one of the worst games of 2010.