Does anybody have any advice?
If you want help post a diagram of how everything is connected. Not a link to some simulator thingy.
Your servo should NOT be drawing power from the Arduino 5v pin.
I never understand why people take the trouble to produce diagrams that are difficult to read - even at full-screen size.In any case, that diagram clearly shows the servo is powered from the Arduino 5v pin.I do hope you have not been asking us to study the wrong diagram !...R
It was the right diagram as it was automatically generated