This is how you get really smooth, lovely satin stitches. Outline in split or chain stitch, fill in the area with chain or long & short stitches, and then do the satin stitch. The underlying stitches support the satin stitch and help it to lay smoothly.
Cross stich rose mural from wunderschön-gemacht: vintage teatime. Do this with wall paint or with washi tape. Maybe not a rose (and I don't know what washi tape is, but This would be cool wall decoration.
Vintage embroidery transfer - 2 large flower heads - water lily & poppy