I can hear the shrill voices of marketing, "99 year warranty" - maybe they knew full well from the start it was take the money and run on a rubbish product.
Not absolutely clear what they mean by "composite" - I suspect somebody tried to make outdoor structural timber out of chipboard - I wonder if it was marked with (whatever the US equivalent is to) a strength grade.
No doubt the manufacturer will blame the contractor for not installing it correctly, blame the consumer for walking on it, go bust and start again under a new name, blame the people that tested it for them, go bust again and finally claim it was someone else that looked a bit like them.