That was the best ending for the show. What are you expecting for an ending? Battles, more deaths, more burning, more non-sense violence? Just because you were thrilled about the best parts of the show in the previous seasons/episodes you're expecting the same feeling. Maybe you're expecting Arya to kill Daenarys because she has green eyes as Melissandre prophesied Arya to kill someone with green eyes. You get saddened because it didn't happen. Being satisfied of the shows ending is the best thank you for the people who created GoT. Just be thankful for 8 GoT years.