Just echoing the frustration here. I do understand how complicated shipping configs can be to program but per product shipping configs seem like low-hanging fruit for Squarespace to invest in. I wish they would!
I'm trying to solve for having two separate shipping locations: one in the US and one in the EU. It is a serious puzzle to try to figure out how to address this. I can't use flat rate and setup shipping zones because each product has vastly different weights, but I can't use weights because I don't want someone in Europe to pay for shipping FROM the US when we have a distro center in the EU. I do NOT want to move to Shopify for this. If anyone has any bright ideas that I am missing, please share! Thanks so much.