How do you survive??

Little one is 4 weeks today and we are breast feeding with some bottle supplement after feeds (of pumped milk)She demands being fed exactly every 2 hours all day long. She will push it to 2.5-3 hours twice at night. She takes about 40 min to breastfeed. Then I have to pump after and feed her a bottle if she seems to still be hungry...that leaves me about 45 min till she needs fed agin...I’m losing my mind. How do people do this?