I don't identify with this at all and yet I think I do in a different way.
DS1 was an adorable baby /toddler and up to about the age of 3 I was incredibly close with him, affectionate, hands on, he fascinated me, we did everything together, I could never get bored of him.
Then from 3 something happened. I don't know if he got the terrible twos a bit late, or if I was absolutely burnt out from giving my whole self to him in those earlier years, or whether I was depressed but I really struggled, every day with him was a challenge and exhausting. The next two years were hellish and I thought regularly about giving him away or leaving myself except that I couldn't do that to him because I knew it would be devastating for him. By the time he was six it started to get a bit better and probably seven was when it turned a corner, but the baby/toddler him was already "gone".
Now I look back, that was probably a natural and normal change, but I was so terrified that our relationship was ruined forever that I didn't know what to do. I kept trying to connect anyway, but he was/is a very intense child and I get irritated by him easily. More so during those primary years.
Then I had another baby when DS1 was 10. That really brought the guilt in because it took me right back to that incredible baby/toddler hormone driven, I want to snuggle you, I want to breathe you stage. I remembered how I used to feel about DS1. It cemented all of those "I've ruined everything" fears. But then I came to see that I didn't really want that intensity with this almost adolescent, and that was probably normal and I realised as well that the intensity of love/physicality you feel for such a young child is probably hormonal and protective. So I think in a way, I do get it - the nature of the relationship changes. I love the tiny child relationship. I am quite enjoying DS1 again now, only in a different way. He's more independent and therefore more interesting. Occasionally I wonder what happened to the little boy in between but it's always been him. I can't see them as different people.
DS2 is coming up for three this summer so it will be interesting to see if I feel the same although I wouldn't let a depression get that bad again and I don't think he will be quite as challenging. So maybe once I've had a more "normal" experience of children growing up I'll get this.