What’s up with boomers and breast milk?

My baby boy is a chunky and happy 8 week old and is exclusively breast fed. When he’s tired he acts hungry, but when my mom’s around she insists my breast milk isn’t satisfying him and I should give him formula. I will walk around with him for 2 minutes and he’s passed out. When I’m at my parents house my dad gets grossed out by my breast milk in the fridge and asks why I don’t formula feed. Anytime I complain about pumping (because we all know it sucks) my mom doesn’t understand why I don’t just quit and do formula.

Maybe I’m just sensitive but it’s so IRRITATING. It makes me not want to go around them anymore. And I don’t trust them to watch him either because of this.