I can see you are frustrated, but being bitter and making sweeping generalizations is not going to help us to help you. You started this thread over 7 years ago, when Windows 10 was supported.
MS supported Windows 7 for over 10 years, by which time it was considered past the point of patching and upgrading because the base structure was flawed in the context of evolving malware and application platform demands. Continued patching was making the structure cluttered and creak at the seams, resulting in more bugs. They even provided support for a couple of critical vulnerabilities after that period. Like you, I loved Windows 7 and I avoided 8 like the plague. The fact that MS skipped v9 and went to Win 10 is some indication of their attempt to disassociate themselves from the very flawed version. The code was almost completely re-written to give the system a much more coherent and secure structure. Most of this is not obvious, and likely the interface is what is most objectionable - that and the on-line collaboration tools that are a demand of a new generation that thinks and works in that context - even if we don't. I loaded 10 and had no great issue in making it look much like 7, and not installing many of those collaboration features - there was even documentation about it on the web through the MS user groups. If this is so egregious to you then you should migrate to Linux - that is your right as a consumer.
Most software vendors are moving to a model of Software As A Service - this is not new: it was happening from the early 1960's with IBM on mainframe computers, and gained traction with PC application developers in the 1990's. It offers benefits in terms of giving immediate updates to all users for bugs, security and feature improvements. Likely the most obvious one for photographers is Adobe and their CC platform. If one does not want to engage with that model there are versions for purchase as a product in the legacy model. So there are alternatives.
As to the Canon EOS 350/Rebel XT: This is a 17-year-old camera and for most companies this would be well past any support. Canon still provide downloads for firmware, and drivers within reason. However, it is unreasonable to provide drivers for a very limited use, on an obsolete camera, for the latest operating systems of which there are now many more: Linux, Chrome, Apple, Windows to name the main ones. The market is under stress and such support comes at a cost.
cheers, TREVOR
The mark of good photographer is less what they hold in their hand, it's more what they hold in their head;
"All the variety, all the charm, all the beauty of life is made up of light and shadow", Leo Tolstoy;
"Skill in photography is acquired by practice and not by purchase" Percy W. Harris
