I’m never going to buy another Apple product. The first blow was being unable to install linux to “my” devices.
Firstly, I think it's now pretty clear that Apple (and others) provide products that have numerous restrictions after their purchase. You don't own the device in a completely divorced context, but instead you have an ongoing, unavoidable relationship with the vendor, and that includes a forced lifetime after which the device becomes unusable (for reasons other than actual hardware failure). This is not unique to Apple, although arguably they've moved to this model faster and further than others.
Secondly, there are reasons for this, and they're not solely about making more money out of you. For many (I think actually most) people, it's an acceptable trade-off. They get a good product experience, at least in part because of this ongoing relationship. For some people, that trade-off doesn't work. These people should not buy an iPhone, nor a Macbook, Apple Watch, or indeed many modern electronic products from many manufacturers.
I think it's worth explaining this trade-off: in concept, and in specific detail for popular products, so that non-technical people can make informed choices.
But both approaches are valid.