I don't buy patterns, unless I actually need to. Like you, I get very frustrated when I get a pattern and have to make my own to the dimension that I want. Rather than do that, I draw my own to begin with. Totes, Wallets, purses all have a similar pattern just different dimensions and designs. When this started, I went to a Thrift store and first looked at all the purses, took a measurement then looked them over thouroughly. I found that almost all purses start with a rectangle. For a deep purse or tote a large rectangle, etc. Want gatherss? Gather the 2 ends. There are so many possibilities. For quilt patterns, I find that all of them have tiny pieces and most only make a tiny block. I can't work with tiny pieces and really don't care for those that have a dozen triangles and tiny squares and some with rounded edges. So, what do I do. I look at a picture, use a page of graph paper and draw to scale my Quilt Block Pattern. Perhaps it is stilly to do all this, but I'm retired, live in a beautiful retirement apartment home with 2 bedrooms on the 3rd floor where I can see a mile away and love it. If you can draw a straight line with the assistance of a ruler, you can make a pattern.