Oh, that made me really sad to read.
I don't think all humans are inherently evil. I work with toddlers and you can see how loving and curious they are. They sometimes do things that we as adults might percieve as "mean" (biting, taking a toy, pushing) but that's not their intention. Little kids are still learning impulse control and learning how to communicate. They see something they want and they don't have the ability to process how to get it in a kind way yet so they just... grab it.
It's also why you'll see kids spill a little bit of something and then just dump the whole thing out. Or jump in a massive puddle despite being in runners and regular clothes, lol.
I find I have a lot more patience and compassion for kids than I do adults, though. It can be really hard to look at the current state of things and not feel like people are evil. There are definitely bad people out there and maybe some people are just born evil (nature vs nurture) but as a
whole I choose to believe that people are born good, or at least neutral.