satin binding is not easy to work with so you’re definitely not alone. One tip that I think could make it easier is in the prep of the blanket. Use a rotary cutter to make the edges of the blanket as straight as possible. If the edges of the blanket are not perfectly straight, then this could cause issues later with the binding. I use the binding clips as not to create holes in the satin binding and I also do not bind around the whole blanket at once. Instead I just bind in sections. When you’re sewing, don’t take out your clips too soon. Sew as close to the clip as you can before removing it. I find that if I take pins or clips out early, it allows my binding to start to get waves. Use a walking foot. That way it’s feeding the fabric through evenly and you’ll probably be able to get closer to your clips. And don’t be too hard on yourself. Even I may get a wave here and there but if I expect perfection, I’d never finish anything 😉