I always enjoy reading these things. Sometimes the answers are quite amusing.

Obviously you've tried to tell management that your manager isn't very good. And what happens? Well, a little bit of pussy-footing. And your manager briefly changes her behavior and then goes back to her old ways. 

Management usually is loathed to look over a manager's shoulder. So things have to get pretty bad before they decide, "It's the coach, not the players". 

And this might be a bit of the "Un-fireable Employee" syndrome where, despite all evidence to the contrary, they will be the last one given the boot. (I have no idea how anyone gets to this exulted state, but it happens.) 

Your boss seems incapable of changing her ways and senior management seems to just want to smooth things over. 

Just leave. Go find another job, or at least start looking for one. If it is a large company, you might be able to transfer internally. Otherwise dust off your resume.