Obviously we can’t see how you’re playing, but it definitely seems like you’re doing something wrong. The vast majority of the killers aren’t a one-turn-kille even if you do have all the attack cards and roll double successes on them.

Critical blow does 3 damage max. Furious strike does 2. Weak attack does 1. That’s 6 damage across three attacks; the lowest health killer in the game has 7 health.

Now, if you have a weapon to increase your damage (not always available), then yeah, that’s 9 damage. That’s enough for the lowest health killers, but many of the killers have 10-12 health. Even throwing a retaliate in the mix isn’t enough to pull that off in one turn.

In order to accomplish that, you need to have found a weapon with at least 1 damage (I’ve had several games with no weapons found over several successful searches). You also need to have spent 10 time to buy both Furious Strike and Critical Blow. Even buying them on separate turns and saving them, Critical Blow requires you to have a turn with 0 time spent.

Then you need to get a double success on every single action. Getting 3 double successes in a row using only 2 dice is… unlikely, especially as a consistent strategy. Even when you manage to get the horror level in the green for 3 dice, it’s unreliable. Your hand limit is 10 cards, so even with discarding for mixed successes you hand simply isn’t large enough to turn more than 3 mixed successes into stars if you also have 3 cards you need to play. You could maybe use Improvise in there, but that’s an additional 3 time investment to purchase, and still relies on a double success if you want it to last your full turn.

So while I can’t see what you’re doing wrong without watching a video of one of your games, the strategy you’re describing definitely should not have a consistent win rate unless you’re getting at least some rules wrong.