for better supports you want polySUPPORT - NOT polysmooth :-)
Pretty much the only thing that will improve the look of curved surfaces is smaller layer heights - ie: more layers, and a super strong print area cooling fan.

I've also seen - a few years back - a slicer that could use a delta to print curves in one go rather than layers.
It was one of those articles tghat popped up once and then I never heard of again.
It was one reason i got a delta. Though i have absolutely no clue who was doing it.

This kind of thing: https://hackaday.com/2016/07/27/3d-p...nar-layer-fdm/

It will work on standard cartesian machines - but deltas are where it should really shine :-)