Hi Yannah,
There are plenty of horrible and useless supervisors and it is no reflection on you as a person or your academic ability, that you are unfortunate enough to have one. Everything happens for a reason, you are stong and intellegent and you can handle it no matter what she says or do,so don't let her knock your confidence.All these issues occuring are flaws in your supervisor's character, not yours. A docterine is a test of resolve and stamina.

I am about to go into my fourth year of my research so this is my advice to you. Construct a concept, a story,so that there is a flow and be very disciplined,intensive and tenacious. Your PhD is yours and you are in control,it is going to be such a testament to you when you achieve it in despite of your supervisor working against you and you will achieve it,you need to be bullet proof when it comes to your supervisor,everytime she is mean to you or starts working against you by being negative and non constructively critical,pent it on the forum or some outside friends or family,not fellow collogues because you want to remain dignified.

Redirect all this frustration that she is causing you to drive you forward. She won't progress very far if she treats prospective academics the way she does,but you can thrive and her opinion really is not the only one that matters, there are councils and advisory boards that can check your work if she starts putting up stumbling blocks.These are set up because of the common destructive behaviour of supervisors,so see if you can locate and talk to somebody confidentialy.So put the head down,its not fair that this is happeining to you and it is definetly not your fault, but one day you will be free from her and take refuge in the fact that some brilliant and really lovely people were treated like dirt and overcame it all to success. Best of luck,stay positive and act as your own supervisor and motivate yourself. AL