Curve tool result doesn't match what you draw

I would like to draw a simple curved line, but when I use this tool, the curve that I see when I'm drawing is quite different from what the final product is.  I understand having a proper bezier curve like Illustrator might be too much to ask, but even the PowerPoint curve tool is 100% better than the one in Storyline.

It would be handy to have a more usable curve tool in Storyline so I can use built-in formatting. It's a pain to create curves in another program and import them as images.