When you think about it Sam and Freddie feeling their relationship was forced makes sense. They had spent years acting like they hated each other, realised they had romantic feelings twards each other, and in a moment went from close Frenemies to boyfriend and girlfriend. That's why a lot of people thought Sam and Freddie were kinda OCC in this arc, they decided to completly change their relationship in one night. That's why Sam and Freddie felt strange being a couple. They tried to change their relationship too much too fast and that made their relationship not feel right. I think this time, knowing they like each other, Freddie and Sam will have a more gradual climb to becoming boyfriend and girlfriend.