You should have stopped at the McDonalds too. I’m curious if they have different stuff at the Scandinavian McDonalds. Herring burger perhaps?
Looks like you had a chance to try all the foods I would associate with Sweden. The meatballs and herring plate look a lot more appetizing than anything I’ve seen at IKEA though (the extent of my exposure to Swedish food).
What nationalities are the people at the hostel? Swedes from other parts or international travelers?