Not sure this really says anything bad about Microsoft. Is it really hard to imagine an NFL coach losing his temper with something let alone a computer?
Have you watched a Pats game? Belichick is about as wordy as a granite counter-top in game and is like a cemetery in front of journalists. That he bothered to complain, let alone did some much to reporters, indicates that there are VERY big problems with them.
And the fact that he previously said there were issues but he was trying to work through them, then years later decided he couldn't deal with it anymore speaks volumes. He actually did give it a shot, for years, and it never got better.
I don't think that's a very sound viewpoint to take on this. The facts that Belichick happens to be the coach of a major NFL team and appears to have a very calm demeanor don't make his opinions on this matter any more valid than the next guy.
It's also not a stretch to say that NFL coaches are mostly from older generations and have never had a lot of incentive to embrace computer technology. Furthermore, they head up highly competitive teams of large male athletes in a culture which prizes assertiveness and displays of aggression.
Put all these things together and you get one guy who's uniquely poised to get frustrated with technology. You also get someone who's uniquely ill-equipped to speak of that technology's actual shortcomings. For instance, the way these issues are described makes it sound like they're having network connectivity issues which are not related to the particular device they're trying to connect to the network. But did he throw the wireless AP at the wall? Nope, he threw the tablet at the wall.
Bill Belichick in his episode of a Football Life lived with the clock being wrong in his car because he simply couldn't change it[0]. I'd argue that all this currently shows is that the system was not worth the time for BB to get to grips with. This is not to say that its a bad system, just that it didn't work for one user. It's only news because BB happens to be in the conversation for greatest Head Coach of an NFL team ever.