Tired daddy and frustrated mommy

I write this holding my 5 day old in my arms and not even sure where this is going to go but I need some help. We want to breastfeed and initially it went pretty well. Baby would latch and eat well. Over the last couple days it has been harder to get her to latch and she falls asleep etc. It got so bad yesterday we had to give her a bottle with breast milk because she just wasn't eating. The advice is not how to breastfeed as we are trying all the tricks and have lactation specialists and doctors appointment today. The advice I need is how do I support my wife emotionally. We agreed before hand that I'd do everything and she would feed. I've tried to do absolutely everything I can. From offering massages to changing every diaper to cooking and cleaning. Just trying to support her so she can recover and just focus on feeding our perfect little baby. But now that we are struggling to breastfeed she feels like she's worthless because she "can't do her 1 job." She's normally so strong and still is but this is chipping at her. I try to tell her it's the baby and not her which I believe. She's doing everything she can and things will get better. But what do I say and do to help her feel better about herself? Please forgive the likely spelling and grammar errors and I banged this out between cries. So ladies what is it that your partner could have said or done to console you during your hard times?