Origins was definitely not the scariest. It was basically just rehashing the previous games and had very few original ideas. When it feels like you've done something a million times before it becomes a lot less frightening. I found Origins fairly easy as well.

Silent Hill 3 had the "survival" part in survival horror done right. Way too little ammunition considering that an entire clip would sometimes not be able to take down a creature. Quite a contrast to Silent Hill 2 considering they gave you far too many health kits and ammo in that game.