If that's acrylic capped, it's like a mirror, and no amount of polish will ever get it back to that again.
You'll always see something...if you look hard enough.
Which is what you're doing. It doenst look that bad to me.
I maybe wrong but you're talking NASA level Hubble telescope type polishing equipment to get that back.
That said, Applesauce is good for iphone and alike.
It comes in 2 stages. A filler, to fill the little scratches, then a polish to smooth it all out
From what I can see, it doens't look too bad mate
Try applesauce? It's the filler stage you're missing, as you'll always have scratches on there otherwise
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Also, PVC restorer used on window frame etc will work too