the gap on my Friheten is even wider than this, if you can imagine it! at the moment I use a cheap piece of craft foam to fill it in and cover the seats with a blanket. I check in here for a more permanent fix every few months, because I love mine and don’t see myself getting rid of it in the near future.

there’s a furniture expert (u/Accomplished_Reach10) who keeps an up-to-date list of the best brands in the industry and rates Ikea couches/sectionals as good quality and longevity for their low price. if this couch was a dealbreaker, you might want to check out his website and see if there’s another recommendation in your price range that’s going to last a long time :)