I found myself in the same situation recently. I've worked for the same company in the last four years, and always had the same manager. Now that we were finally working properly as a unit (we started as a very small team and grew more recently as well), due to a change of CTO, we were forced a new manager (because he wanted someone he knows better, i.e., control better). I did my best to look on the bright side of it for the last 4 months, but now I've reached my tipping point, I'm already in interviews for other companies.

Hope you have better luck than me.