Everyone can only share their own experiences. In my case, I had a difficult birth, hospital stay and I wasn’t able to breastfeed when I really wanted to - I was diagnosed with pnd possibly as a result of those things combined. Im not sure if it was depression as such, certainly a lot of anxiety. It was also lockdown and I felt even more isolated than I might have done as a new mum anyway.
Having said all that, DD was a comparatively easy baby. No major allergy/ colic type issues, fed well once we realised breastfeeding was never going to happen and switched to formula, reasonably content. She did however refuse to be put down basically ever, so I basically held her for about 4 months straight. Once I’d embraced slings, contact napping and cosleeping at night though, she mostly slept for reasonable stretches and things became manageable again.
I felt very very low for about 6 weeks, I just couldn’t stop crying. I could still cry now thinking about the feeding thing, and she’s nearly 2. But in that time I was still indescribably in love with her, I ate loads of snacks and watched a shit load of Netflix.
Each stage has got easier in some ways, harder in others. But totally and utterly worth it for me.
Ive missed that newborn phase a lot since and would totally do it again even knowing how very hard it was - that’s not going to happen for various other reasons, but millions of women do it again (and again and again) so they clearly don’t find it so hard as to put them off completely.
Disclaimer - I had a supportive partner (although fuck me did it test our relationship and still does), good health and reasonably comfortable financially so didn’t have to rush back to work before I felt ready (though for some people the going back to work bit is when it starts to get easier) and whilst we are not loaded we have been reasonably able to throw a little bit of money at stuff when needed, eg we eventually paid for a (very gentle) sleep consultant when things got unsustainable around 12 months, or just stuff like ordering in the nice food/ take always, getting some ironing done for us when we were too tired to function etc.