Breastfeeding is a waste of time

This is what my SO told me today and I need to vent. I'm 35 weeks pregnant with my first child, my SO already has two children so he knows everything apparently😣 His other children were not breastfed. The first one didn't breastfeed because the mother didn't like how it felt and the other because the baby didn't like it. My SO says breastmilk tastes nasty 😒. I reminded him that he's not the one drinking it lol. I try to tell him all the benefits and it just goes in one ear and out the other. I'm taking a breastfeeding class this week and he does not want to come with me. He just keeps telling me it's too hard and I'm not going to be able to do it. It's like just because his other children's mothers couldn't he assumes I'm automatically going to fail. He can't wait to say I told you so. It's really hurting my feelings. How do you guys deal with people not being supportive of your decision to breastfeed??