Yes, I know the answer is "don't buy them".
Anyway: I've been seeing posts in places that follow the format: "Look how item X in (rich country) costs the same or is more expensive than in Poland"
Admittedly, those posts aren't about basic necessities. They are about football tickets and the stadium beers or about Subway sandwiches. Although from personal experience, I know that this is happening with groceries as well. Inflation and the war across the border was a great excuse to hike the price of some goods. This doesn't seem just to me, given the wage disparity between say Ireland and Poland. But hey, you gotta get that YoY 20% growth somehow. Poland being the poster child of "look what capitalism does".
So when we take the example of buying groceries to stay alive, what alternative do you have to the large stores that are obviously fucking you over? I can afford to pay those inflated prices, I just don't want to affirm the effectiveness of the "let's hike the prices of everything because we have the excuse to" master plan.
Here are some loose (privileged), perhaps not particularly good ideas that I've had:
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Buy food from the inflation basket The Polish (and others probably too) statistical institution keeps a "secret" basket of items based on which the inflation is calculated. It's clear that at least some of those items are known to the stores, because they always cost less, to artificially keep the inflation down. This could work, as long as the stores don't drop the ball on the quality.
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Buy local? The thing is that while a supermarket chain has a team of people trying to get people to buy more stuff, the humble farmer selling stuff on the local vegetable market does not.
The same goes for clothes, as I could get bring my own materials and get some made by a local tailor, rather than buying off-the-rack chinesium from Zara. And look a little more old school wearing it. Though a tailor is a different level of service.
My local fancy soap shop is several times more expensive than just buying generic tallow bar soap. Sure it's made by local workers within my city, but that's part of the value, hence the price hike.
You forgot the others with the same problem.
For most food there are agricultural cooperatives (Community-Supported Agriculture, CSA). They have several benefits, but one is a relatively steady and plentiful supply of local, seasonal food. It's best to share surplusses with friends or local foodsharing networks (online, public fridges) and to become knowledgeable in food conservation.
For foods and products better produced non-locally (transport costs are just a small part of product life cycles (Life-Cycle Assessment)), there is the group buying strategy, where folks gather to buy at reduced costs (be careful not to reinvent the supermarket from scratch though).