Some behavior can't be fixed an hour at a time. When a dog rehearses the same pushy, over-aroused pattern every single day, the fastest, kindest path is to change the environment completely for a few weeks. Consistent rules, consistent handling, no chances to practice the old habit.
But the dog is only half the job. The last phase of every board-and-train is transferring the results to you: the video of their stay, a short write-up on where to start, and follow-up lessons if anything still isn't clicking. So the dog you get back is the dog you keep.