I install an Ekodeck about six years ago prior to the Quickfix hidden system.
I used the Cameo hidden screw system at the time, the Ekodeck kept breaking at the screw points and lifting away from the frame.
Since then I have lifted the deck and cut a rebate into the boards using a router (burns through the bits very quickly) and relaid with the Quickfix hidden system.
Upon reflection I wish I had laid a wooden deck as the Ekodeck gets very hot in the summer and mine never looks that clean as when new.
Anyway you learn by your experiences
I'm just starting to look at decking and I note they recommend adequate ventilation to prevent heat build-up. I wonder if that may have been the cause of yours breaking away from the fasteners and lifting (due to expansion when hot). I won't be able to install mine with any ventiilation at all (apart from the gaps), but we've just installed a LouvreTec roof, so that'll reduce the insolation.
Welcome to the Bunnings Workshop community @DD-Xrx. It's fabulous to have you join us and many thanks for jumping into the conversation.
Let me mention @gbaker1512 so they are alerted to your question and hopefully can offer some feedback.
We look forward to hearing more about your decking project and we'd encourage you to let us know if you ever need assistance or have something to share with us. I trust you'll find loads of inspiration within the community as our talented members are contributing their own projects here all the time.