Rant - feel like a failure

Hi ladies.

This is more of a rant then anything, my daughter is 10 weeks old and has been exclusively breast feed since birth. The beginning was so tough. She had a posterior tongue tie and was taking hours on the breast and still being unsettled. I dealt with the normal but exhausting cluster feeding at the beginning and wanted to give up all the time but I didn’t. She lost over 11% of her birth weight and wasn’t at her birth weight until 4 weeks old. The cluster feeding stopped, my milk came in and her tongue tie was not causing any problems with latching but still she gained weight so slowly, I mean 2oz at most a week. She dipped on her growth lines but is a happy baby, feeding for 20mins a breast coming off satisfied. Finally this lack of weight gain came to a head and I was advised by my health visitor to take her to the hospital to be seen by a paediatrician. I did this and they took some bloods which came back fine. The only problem they can see is feeding, I was given a feeding plan which consists of feeding for 30mins topping her up with a bottle of either formula or breast milk and then pumping for 20min a breast. I know there is no problem with my supply but will do what I’m told and get her re-weighed next week. I feel like a complete failure in all honesty, I’m not able to keep up with this feeding plan as it’s taking about 1.5hrs each time and that is with my husband feeding her the bottle when he is home, 2hrs when he is at work and so I’m having to give her formula. I feel like what was the point in persevering in the crap at the beginning to be told it’s my breast milk and feeding that is stopping my baby from growing???