I’d say newer Pixels have even more privacy issues than the older ones because of cloud based AI features (ugh when will the bubble finally pop?) and stuff. However the stock OS is bad for privacy in both cases so a custom ROM is a must and afaik installing it on a Pixel is not too hard. Also new Pixels seem to get custom ROMs very quickly so you don’t have to wait for months or even years for someone to make one.
Plasma, Plasma… At least they reverted the changes this time and didn’t just leave it as is until they finish the fixes.