Can you talk to your old boss and see if you can get switched back to him? Having a bad boss is the worst. If you can't switch back to your old boss, I would request weekly or biweekly one on ones with the old boss (who I think is also your boss' boss?). Ask for coaching or whatever - just try to get yourself in front of him on a regular basis so he is aware of your work. The new boss sounds like the kind of person who would try to blame someone else for his poor leadership and laziness.