I literally explained why it is set up like that. Except for the part where they use money of the foundation to make more money for the foundation.

Gates is in full control of what he “gives” away.

And rightfully so. The foundation is always looking for organizations to give grants to. You can’t just give it all away randomly. To give away so much money you need to put it somewhere where it can be distributed fairly. Which is exactly what the foundation is doing.

The only real argument you can have against Gates is whether or not he should be giving even more. But that is not the best argument because he still is giving away much more than people more wealthy as him.