Feel like I am going to give up bf

So I only have ever been able to get 1 1/2 between pumping breasts every 3 hours. Baby can’t latch due to tongue tie and wasn’t very well at the start. So because we were giving him formula in bottle he doesn’t have the patience for breast now, I don’t mind to be honest. So he is having 1 1/2 oz of breast milk plus 3oz formal every 3 hours. My question is.... is their any benefit to my baby from the small amount of breast milk? Or should I just stop wasting my time? Baby is 3 weeks old