The BBC article that this article is a bizarre summary of is far better (the Gizmodo article even links directly to the BBC article). It give a far better overview of the issues; the main crux is they cost most than anticipated through both theft and cost of the machines themselves. The consumer’s disliking it is a less point and more naunced essentially “customer’s want the technology to work but it isn’t” which is also what you’ve said.
Personally I preferred the self checkouts because I don’t want to interact with someone, but th they fail so much (because of the weighing which is to stop me being a supposed thieving scumbag, not to benefit me) and you end up standing around waving at a random stranger to come and fix the machine awkwardly while a massive queue waits impatiently for a machine. I’ve recently switched back to the manned checkouts for bigger shopping trips.
I think a lot of it comes from schools, and in particular physical education and competitive sports. There is nothing wrong with competitive sports but the attitudes around it in schools can be so toxic, and in particular it can be used to create hierarchies. The idea of being good at sports and that being masculine was something I certainly experienced a lot at school. Also people who weren’t as academic but thrived in sports were lauded.
My school had various sports teams and clubs, and fuck all academic activities. Sports aren’t toxic but the attitudes around them can be, and particularly adults who feed in toxic attitudes and values around it.