Bill Gates did his legal duty. When you run a corporation you have a fiduciary responsibility to it. He would be doing something immoral if he didn't do what was best for Microsoft.Interesting. In the 1970s, ITT's CEO Hal Geneen gave $700,000 to Jorge Alessandri to help him beat Salvadore Allende in the Chilean Presidential Election, correctly believing that ITT's financial interests were best served by defeating Allende. When Allende won anyways, Geneen gave $1,000,000 to the CIA to help finance a coup d'etat in Chile. Would he have been acting immorally to refrain from financing bloodshed?
We can also look at Hershey in Cuba, tobacco companies, companies lobbying for the right to destroy the environment, companies that engage in bribery and contract rigging, even companies that lie about whether their products are healthy. In each case, I think we can find a healthy proportion of people who do not agree that the unrestricted pursuit of "what is best for the company" on the part of its officers, managers, or rank and file employees is automatically moral.
The second point of interest in your post is that you talk about the theory of free market capitalism. This is a very interesting point in any discussion about Gates and Microsoft, and that's why I gave you an upmod and replied. I think it is very possible for someone to be rabidly pro-capitalist and anti-Gates precisely because many of his and Microsoft's actions were anti-free markets.
Business and free markets are not synonymous, in fact the usual case is that when left to act without restraint or oversight, businesses act to make markets as closed and unfree as possible. It is possible to be anti-business and pro-markets.
I do not accept your statement that the theory behind free market capitalism is that with enough companies doing the same that things "average out to the best results" as applying to morality. I think you should be more precise about what you mean when you use the word "best."
Unfettered business is a little like pure democracy. There's a reason that our respective countries thrive under a constitutional democracy: There is a notion of right and wrong that is independent of the notion of what wins an election. Likewise, I believe there is a notion of right and wrong that is independent of the notion of what makes the most money.