Our eldest was ten when we moved and furious in a quieter way, which was almost worse than slamming doors. What finally helped wasn't selling it. We gave him a real job in the move. He planned our first weekend in the new city: he picked the places, checked the bus routes, and was in charge of the map. It gave him something that was his, rather than something being done to him. He still talks about that weekend.
Our 14-year-old is furious with us. Leaving friends at that age feels like the end of the world, and honestly I can't blame him. We're trying to involve him in the choices but every conversation ends in a slammed door. For those who moved with teens — did it get better, and what actually helped?