I don't know what exactly you're referring to, but now that he's there and an internationally known figure, I don't think he can realistically try to go elsewhere, nor would it be wise for him to make trouble with his hosts. I highly doubt he has any love for the Russian government, but he's an American and took the actions he did to have an impact on America. You keep implicitly saying "well if he's such an idealist to have blown the whistle in the first place, why doesn't he behave like a naive idealist in all regards - and if he's not behaving thus he must not be as pure of intentions as he claims" which is just ridiculous given the reality of the situation. He knows what the US security apparatus does to true naive idealists like Drake and Crane.

And he's supposed to do what, antagonize the government of a country he can't leave which has no enforceable free speech protections and can deny his asylum and send him to prison?

If the US didn't want him to be in Russia we could easily let him come home.