There is nothing wrong with a quilt made from polyester or poly blend fabric, or dry clean only fabric. Washing the fabric once with very warm, or hot, water and drying in the automatic dryer on medium will pretty much stabilize it. I made a super king size quilt out of the soft polyester knit from the 1970's and used it as a bedspread for over 25 years. Washed it in my home washer and dryed it in the dryer many times. I have also discovered that many of the home decor fabrics that say dry clean only can be washed OK. I make clothes for a handicapped person (can't buy clothes to fit her) and use decor fabric often. I wash all fabric first to get the shrinking over with before I make the slacks. They are washed and dried frequently. In ten years we only one pair has worn out and it was clothing fabric.
If you don't like polyester, don't use it. The complaining is getting old.