When a “bird’s nest” of thread appears, the likely culprit is your upper thread tension. If loops appear on the underside of the fabric, the upper thread tension may be too loose. If knots appear on top of the fabric, the upper tension may be too tight.
Make any purse or bag easy to grab-and-go by adding stiffness to the straps so they stand up on their own. Ellen March shows you several products that can help you achieve the strap stiffness you want(Diy Bag And Purses)