And they'll have a built-in best friend. We talk about our personal perspective, but what do you wish your parents did for you?
Anecdotally our third child is the least anxious and most confident out of the three. We were clearer about the stuff that really didn't need sweating over - we had no choice!
It actually gets easier the more children you have, not more difficult.
Going to three is exponentially harder. With two, one parent can usually manage both or worse each can manage one kid. Go to three and parents are outnumbered. And generally only two kids ever get along at one time, so there always the outlier. Even numbers are best it seems.
I'm sure parent-to-parent IRL, people are a lot more negative (read:realistic) about their experiences.