It doesn't help how there's also a wide assortment of areas in each campaign; Leon goes from a school/city to an underground crypt to China, Chris goes from old warehouses to Eastern Europe to China, to an Aircraft Carrier, to a Harrier segment, to an underwater base, and Jake goes from Eastern Europe to a snowfield, to China, and the Underwater base. I remember finally getting through Jake/Sherry's campaign and thinking, "Fucking finally." Oh surprise! Ada has her own campaign! MOTHERFUCKER!!!! And that bitch goes from a crashed sub, to China, to a fucking Aircraft Carrier. I get they need shit to be intertwined with each other, but it's all over the fucking place.
I think the other problem is, the action never stops, and action is the only tension. There's never a "slow and steady, stay quiet" nervous tension; it's always a THIS SHIT WANTS TO KILL YOU! SHOOT SHOOT SHOOT! I got fucking burned out on shooting shit across eight seven characters. Looking at Ada's well designed ass in the leather pants were the highlight of the entire game.