How do I put this politely as members have complained about my replies in the past, hopefully with you being an Ozzy you can take it like a man and not like the delicate little petals who have complained before.
You have confirmed other bluetooth devices connect, myself and others have confirmed our controllers connect so this has nothing to do with Minix and everything to do with your controllers, may I suggest you go to the PSN forum and look for answers there. Short of you shipping your controller to Minix there is nothing more they can do.
If gaming is your main reason for purchasing the U22 then I suggest you return it and go for the more expensive competitor box that is designed more towards that way