I think maybe it depends on the temperament of the children tbh.
For me, 0-1 was much, much easier than I'd been led to believe! I had friends and family warning me how difficult the first few months in particular are, how my life would change forever, I'd never get to have a wee in peace again and so on. And it wasn't like that at all. I absolutely loved caring for DS1, didn't feel like I was giving anything up (felt like why on earth would anyone want to do x y or z when they could be doing this?
). My life changed, but for the better, by far.
I expected 1-2 to be as straightforward. Christ, no! A colleague once joked that, 'One child is like having a pet, two is like running a zoo'. I was exhausted, never got to relax or have quiet for a second, struggled to get dressed and get DS1 to school let alone have any form of social life whatsoever - a trip to Aldi was like planning a military maneuver! I felt guilty every moment that DS1 wasn't getting enough attention, DS2 wasn't getting enough attention, my partner wasn't getting enough attention... But DS2 had reflux and never slept, which didn't help. However, DS1 was almost 7, so it should have been easier than a baby and a toddler, you'd think?
I love my kids beyond measure, but I wouldn't go through those early months of having two again for anything! I have friend who say that 2-3 is the hardest in their opinion as society is arranged around 2 child families - you need a new car, special offers are for 2 adults & 2 kids, holidays become harder... 3-4 and 4+ is a doddle in comparison, I am told, but I have no desire to find out 