Yep, some of the plastic CVA stocks were flexible and pretty bad: So were the stocks on some other makes. The plastic stock on my TC Black Diamond is not very good either: Wish i could find a good replacement wood stock for that gun.
Never did like any kind of plastic type stock: This includes fiberglass and composite. Every one of my centerfire rifles have wood stocks. Wood stocks worked pretty well in those Mausers that the Germans carried into Russia. They also worked pretty for the Japanese army in the Pacific. Wood stocks have worked very well for we and i see no reason to change.