I think one of the best things we can do for ourselves is give ourselves a break, don't expect perfect, just do the best we can. I quilt and make garments. When I was doing civil war blocks, small ones I had to learn to quit expecting perfect and not only is it less frustrating and my seam ripper gets used a lot less, I sew more. I know people who don't do this and sew less because they don't think they are any good at it. You won't be good unless you practice.
One of my garment teachers who is know all around the world told me the best gift I gave my self was not to expect perfection and enjoy the process. If I look at a pattern too long I'll start thinking I can't do it but when I just do it, I usually figure out how to do the hard part or realize it wasn't hard after all. flipped seams are common