Bill Gates follows a pattern seen very often. Geeky loser gets incredibly rich and/or famous and spends the next decades trying to relive the sex life of his youth he never had. Serial ex-partner/ex-wives/children of multiple partners/stories of infidelity follow.

Bill Gates is fabulously wealthy because of his mom's connections, luck, and being a monopolistic asshole.

I really doubt Melinda didn't know what kind of guy he was before she married him. Like Melania Trump, she made a deal. Melinda got tired of the deal, or Bill just got worse with age (also very common).

Nothing surprising about the situation. I would just like her to spill about Epstein and Gates. I expect she fears for her life if she did.