My no-plastic life: I tried to cut out single-use items for a month

Yep. You can take your well-worn canvas shopping bags to the grocery store, but good luck finding food, toiletries, & such that aren't clad in single-use plastics.

Given how well excessive packaging works, from a marketing PoV, the most reasonable solution is probably a tax on packaging. Though if you actually wanted to enact that (vs. scoring performative virtue points), it'd probably need to be sold as a truth-in-packaging measure - "don't you feel cheated when you realize that you spent your hard-earned money on a big, shiny box - that had just a crummy little product buried inside it?".