I had a quilt that started about twin size and ended about lap quilt size by trying to beat it into submission ot lay straight...
FINALLY - I purposfully cut it crooked...meaning I made it a wonky rectangle....I attached a ribbon to the top 2 corners - gave it to my Mom and told her it was a wrap quilt to tie around her shoulders and neck and was crooked because that's what the pattern called for and I wasn't sure if I liked it or not but hoped she did! She LOVES it!
I have decided when the fabric has a mind of its own and doesn't do what I want it to - to change my perspective and decide its perfect and exactly how I wanted it and then I become completely happy with it!
Hang in there - when you've beat it into submission and it is tea towel size that's when you have to worry!