Hun, I can BF but my DD2 can't. I don't feel guilty for making the decision to wean her as a very young baby because she was literally dying of starvation. If you or your baby can't BF it will be reflected in their weight gain and their wet nappies. Many babies are gaining weight and weeing and pooing heaps when their mothers think that they can't BF. Breastfeeding is a learned skill and takes a lot of time and patience to learn. When we are sleep deprived we often struggle and give up before seeking help. The first 12 weeks are the hardest, because we are adjusting to a whole new way of life. We just don't notice how well our babies are doing on what they are getting from us, because we see them crying for another reason. More often than not babies are crying because of wind or some other discomfort.
Before giving up BF, seek help. Count the wet nappies each day. Weigh your bub. Those nappies and baby's weight will tell you if you can BF, not what you can express with a pump, and not an unsettled baby. They are unsettled for more reasons than just hunger.
As for the MW you saw, can you change MW to one that you 'gel' with better?