Agreed The first two child-raising scenarios (infant and terrible twos) are the hardest, but that’s because it takes a bit to get used to your newly unlocked Parent class abilities.
I think the intro (infant) scenario wasn't too difficult, despite the permanent sleep deprivation scenario effect.
The next scenarios, "terrible twos" (x2 in my case) and "toddler monster" are way more difficult, due to the complete unpredictability of the toddler monsters. And though battle-worn, I don't feel like I've unlocked enough of these so-called "Parent class abilities". Though the recent items purchased at the shop, "iPad" (+1 distraction to toddler monsters) seems to help immensely. These at least buy time until I can convert Toddler Monsters to the Hero/Player side. Still though, the "-6 to Game-playing time" scenario effect until that conversion happens is a real morale-killer.