Squeal is typically caused by pad material or shims.
If you're using OEM pads/rotors/shims, only times I've ever had or heard of others having squeal issues is when the brakes aren't getting enough exercise (to cycle and heat them up) and they develop a glaze. Or improperly bedding them. Try going for a spirited drive and really hitting them hard to heat up.
If using aftermkt pads or rotors... could be any or combination there of and there have been many issues w/ different composites causing issues (and of course many trouble free too). To OP, how did you get warp w/ new pads/rotors as they are really beefy other than a really bad component. Wonder if you might have a caliper issue going on too?
Good luck
