Don't Microsoft own a fund? Wouldn't they realistically send the same team to value Linkdin and Nokia?
Would you send the same people after the job they did last time?
This criticism is only valid if you can show that the due diligence team that worked Nokia also a) misreported the red flags / the enterprise value of the acquisition, and b) were responsible for mismanaging the post-merger integration.
A good deal of M&A goes ahead despite the warnings from the DD team. Sometimes it's a matter of CEO ego, sometimes a strategic long shot overruling the red flags.