Yeah, he did it all for the immense personal gains of … getting poisoned, imprisoned, and dying in an Arctic prison colony before reaching 50.
Navalny being a Russian chauvinist should be utterly unsurprising: it would be significantly stranger for Russian opposition to be a stereotypical '60s hippie as opposed to, you know, Russian.
Personal gains as in hoping to become the next dictator - he gambled and lost. Nothing more, nothing less. As I said, I don't believe anyone in russia wants to change the system on either political level or social level. From what I can see, (almost) everyone strives for this lifestyle. It's only a question of who comes out on top.