I don't feel like this, but I do understand how people can. I wasn't maternal at all when I was younger, I'm impatient and used to pleasing myself and doing my own thing as DH is often away with work, and I was very worried about whether I would feel maternal or enjoy/be good at being a Mum when I was pregnant. Happily for me, I adore my DS, and I love being a Mum, wouldn't change it for the world. It's hard, but I don't yearn for my previous life at all, much as it was great fun at the time, and I do recognise I'm very lucky in that. By the same token, I can see how it would very easily go the other way and someone who thought they'd be very maternal find that it's not a way of life they enjoy as much as they thought they might.
I think my Mum probably wished for her old life back at times. I was an exceptionally difficult child and teenager (I honestly look back and shudder, I cannot imagine how she coped with me) and my Dad was away a lot so she parented solo most of the time. Now I'm an adult we have a fabulous, close relationship, and she is a wonderful Grandma to my DS, but I think she found having to parent me when I was younger very difficult and, whilst I've never for a second doubted her love, I think when I was a difficult child/teenager she probably would have wished for her old life back, and I can understand why. DH and I would like another baby and I'm very frightened that my temper, which I'm in control of as an adult but definitely wasn't as a kid, will come to the fore in the next baby. DS is comparatively very easy, and my DH is extremely hands-on when home, and I think that makes it easy to enjoy being a Mum. I can see how easy it would be not to feel like that if your partner wasn't hands-on or you had a more demanding child.