DP was jealous that he couldn't feed her & kept encouraging me that it would be easier. He would be able to get up in the night to let me get some sleep.
My partner was the exact same. He was asking me to stop putting myself through it, and to let him help and saying he felt useless etc etc.
He just didn't think it would matter as our girl would be healthy on formula or breastmilk. I didn't listen to him and it did affect their relationship, but that's just what happens with breastfeeding. He was the same with our son because he didn't want to miss out on the love. Third child he finally understood the importance of breastfeeding. Dads just have a different role, doesn't mean it is less important.
His mum had formula fed all her children and was convinced that the benefits of breastfeeding was a big conspiracy. Even something about breastmilk making kids "dumb" and she was apparently starving them all in the first 24 hours so had to stop? So he thought it was pointless suffering. I do think a supportive partner will look past a babies needs to a mothers needs, but it is also really important that a mum knows her child is just as important to the dad as the child is to her.