[bad_user]

      what is wrong with Microsoft in terms of providing 
      developer tools or marketing support

Nokia doesn't lack development tools, neither marketing support. They also have all the resources they need to produce an operating system / platform to rival iOS and Android.

They lack focus.

Android also had lots of flaws when launched, but Google & partners kept iterating. Nokia could have taken the world by storm simply because they can push lots of cheap smartphones all over the world. And the Ovi Store could have been the most popular app store. If only they provided enough consistency across what they are doing.

And Microsoft?

When choosing a partner you have to take into consideration the company's track record. Microsoft has been caught resting on its laurels several times over the years, with Windows, with IExplorer, with Windows Mobile. It also has been caught screwing several of its partners.

Microsoft transformed PC-makers in cheap complementaries to Windows and bloatware. Microsoft also forced PC-makers to only bundle Windows with new PCs.

For us (devs and consumers), Android and Windows Mobile may be good things, but for Nokia this will be a disaster.