Not having a go at anyone, I promise. I've nannied for 12 years in London, mostly for 1-3 year olds, and I see the same pattern almost every evening.
The handover is where it often goes wrong. Parent walks in, kid melts down, parent assumes the child has had a horrible day. They haven't. They've held it together for me all day and you're their safe place.
Things that help: get down to their level and give them five quiet minutes before asking questions. Don't ask me for the full rundown in front of them. Snack ready. Phone away for the first ten minutes.
Would love to hear from parents on what you want from us at handover.