Community with Troy and Britta and Annie and Jeff. After Dan Harmon was fired and replaced by David Guarascio and Moses Port, they decided to ruin the show in season 4 with awful writing and character choices (probably at the behest of the network). This included a sudden nonsensical Britta and Troy relationship and weird romantic stuff with Annie and Jeff in one episode, which may have been the worst Community episode imo. The whole of season 4 mostly sucked with just a couple of bright spots. Fortunately Harmon came back on board, righted the ship and wrote 2 more enjoyable seasons.