I don't know. Aho is not big at all and Laine didn't really caterpillar his way to anywhere either. I still think there is nothing really wrong with your team. I would certainly take Team Russia personnel on defense over Team Finland.
I think it is just a mental thing and mostly RNG as I said earlier. The tournament format is built for randomness. Also Team Finland gets underrated as per usual and this time two of their top lines are lead by premier two way centers making it kinda hard to win against them.
And to make things even more confusing, I would still take Datsyuk, 37, over either of Koivu or Barkov right now.
In conclusion, it is RNG. Don't worry. World Cup is just a few months away