I feel bad and need advice.

So I'm 5 weeks postpartum and loving motherhood with my little boy. breastfeeding has been a struggle since the beginning, had to use a shield and he lost a bunch of weight and had jaundice. We had to start supplementing at a week and a half. The most I was ever able to get while pumping was 3 ounces combined. 😥 nothing I have done has been able to get my supply up and now I only get 1.5 ounces combined. Its a serious struggle, especially to pump every 3 hours, and I'm just stressed all the time about it. If I gave it up would I be terrible? I feel like I would be. 😢