This is an understandable reaction and I am sorry that you are having a bad day today, OP.
To answer the question, I had my children at a relatively young age, which I think probably helped my body to recover. No, my body wasn't quite the same (developed a "Mum-tum" which never went back to pre-birth state or shape, with an interesting pattern of stretchmarks, and then a second lot over the first lot later), but I don't mind and neither has any partner since (and if they did they could get lost anyway)). My breasts changed a bit and then again after breastfeeding, but they have changed much more as a result of aging, and the start of menopause and my weight going up and down than they did from breastfeeding at the time (and anyway I loved feeding my babies so wasn't that bothered about related changes, although it'd be unfair to say that I didn't/don't occasionally lament my lost youth and pert bosom, but just as a passing thing).
Personally my SPD resolved itself after birth, my pelvic floor has been fine, didn't have any long term effects from my 2nd-degree tear, just a barely-there scar which causes very-little to no problems at all, sex life and continence have been fine all along. I am very well aware that I am at the fortunate end of post-birth body experiences though, but at the same time, you probably hear and read more about the bad stories than the good. I've always been comfortable in my own body though and not prone to lingering on thoughts of wishing it was more perfect, so I think that has helped too.
Everyone is different though, in both how their body does or doesn't change, and how they feel about it and deal with it. It's really a very wide spectrum and your feelings on this are always going to be valid. If your thoughts get out of hand though, get some RL help to talk it through and perhaps change perspective.