Get rid of the wiggles. They look pointless and will be a nightmare to mow. Have either one sweeping curve or just a straight line following the house wall. Increase the size of the bed X 3 and plant far more plants, in multiples. Personally I hate coloured mulch but that’s a matter of taste.

Planting a garden is not an overnight success the plants you have chosen will take time to get established . I need to see the house too and I agre the bed is too small and too curvy but IMO plantings need to enhance the house so please post a pic of the house and how this be relates to it.

Here are a few ideas (it takes a few years for perennials to fill in):

I hope this picture will help to see the house a little better. But I totally agree, it needs to change the curve and increase the size.