It's not actually weird that Bran misses a season of Game of Thrones, especially if you've read the books
This minor Game of Thrones character might be the series' main villain, and he's only in five episodes
House of the Dragon season 3's biggest mistake would be mishandling this part of Rhaenyra's storyline
Game of Thrones gave Theon Greyjoy more screentime, and it completely changed his story from the books