Re: And I had just bought some more Xeons, too…
Might I suggest that you haven't done any calculations on this?
"In the UK the official year-on-year inflation rate is said to be around 10.4%. In reality it seems to have been a weekly 10% increase on food, sometimes 50% overnight."
Do you know what that would actually look like? People have really experienced that, but I can guarantee that you have not. If there was an average weekly inflation rate of 10%, then something that cost £1 a year ago would now cost £142.04. Has that happened? To anything?
"Supermarkets say it's because of inflation. I am more inclined to believe it's their price gouging which is driving inflation."
There's some of each, but you can see some of the causes in the increase of raw commodities. For example, at the beginning of 2022 wheat cost on average $7.58 US per bushel. When 2023 started, that had risen to $8.95, about 18% up. The destruction of Ukraine's wheat industry didn't help with this. That increases the price for items made from wheat without the retail outlets having to do it. Not to mention that, if you're in the mood to assume that every price increase is due to someone's greed, you are ignoring all the links in the chain at which a price increase can be inserted and putting it all on the one link you have direct contact with. It wouldn't be that hard to trace the price increases through the chain, but you need to acknowledge what the real increase has been before you can take that step.
Also, you don't appear to understand how such stores work:
"it looks more like they are doing everything possible to maximise profit": They would be, since they really like profit, but let's look at what you think they're doing to do so.
"removing own and 'no-name' brands,": Nope. The ones they make themselves mean they get to have a higher profit margin on them and they make more profit. The no-name brands they don't make also tend to be from places that cannot command customer demand and thus the stores get better profit margins from the sale of those as well. This change decreases their profitability, and it might have something to do with the fact that larger companies with their own brands may be better able to obtain resources when there is a shortage.
"keeping shelf stock low,": Sometimes this helps, but mostly when they would waste some by keeping more. If you would stock up if they had more available, they'd make more profit.
"limiting choice,": I can't argue with this one in general, but as we've already covered the choices they removed, I'm not sure I need to.