Most of those examples are basically "company x tried to sell a Windows Mobile phone back when smart phones weren't anywhere near the market they are today, and

Most of those examples are basically "company x tried to sell a Windows Mobile phone back when smart phones weren't anywhere near the market they are today, and when Windows mobile was very average and it didn't work out." Hardly seems like Microsoft was at fault for anything other than not making a better Windows Mobile. And most of the companies in that list were notorious for selling poor quality phones anyway, regardless of the software. Partnerships don't work out, but there doesn't seem to be many examples in that list of Microsoft leaving those partners out to dry, it's just a case of the product wasn't good enough (from both Microsoft and the phone manufacturers).