She obviously doesn't find walks rewarding. And for a dog that doesn't like walks three walks a day is asking too much from her. Give her a couple days off then start taking her for one short walk per day. Like super short to start out. Skip a day every now and then. She may end up being more enthusiastic about going on walks once she realizes there is only one time per day to access the world, outside of the house, offering tons of interesting sights, smells, and other stimuli.
Plus make sure she knows your exited "Whoopi, time to go explore the world!!!"