While any fabric can be made into a quilt if you’re willing to be flexible, some garments are just tougher than others. Here’s a few based on my experience:
shirts with lots of panels and darts
jersey knits/t-shirts: these you have to stabilize if you’d like to make them into a quilt
sheer fabrics: they’re often too weak to hold up over time
slinky fabrics: any fabrics with give and stretch are going to be tricky
inexpensive wovens: I’ve had fabrics rip in half as I was trying to deconstruct the garment
sequined fabrics: the plastic bits can be tricky, especially on a sewing machine