"And it runs Office better than Linux or Mac"

Yup, been doing that for decades. It's called "vendor lock-in". And its unethicality has been discussed comprehensively for decades as well.

And when countries tried to move into an open document format - they'll bully the country, using the strong arm of the Uncle Sam, until they're back to MS Office again.

So when people are amazed by Bill Gates' charities - I don't. His money comes from the sufferings of countries.