I'd love to know the answer to this as well.
Years a go I stayed in a school for a year and half waiting for it to get better and it just got worse.
I've been at my current school for a term and a bit, and whilst much better than the other school I mention above, I don't really like it, but I can't put my finger on why. I can't decide whether it will get better or not My suspicion is not, or not for a long while anyway - the whole place is in chaos.
I've just been approached by a school that I did supply in last year, and there, I felt settled within about 3 days of arriving - I'm so so tempted to move.