That's a fair criticism, and actually I doubt Snowden would disagree with you, though we don't really know his views at this point. What we do know is that he has little choice if he wishes to avoid being arrested in travel, rendered or becoming a stooge to a powerful enemy of the US like China or Russia. Ecuador may be his least-worst option, as HK was to avoid detention initially.

While it would be admirable to remain and try to fight the administration in spite of their policies on Manning and calls of traitor, I do understand his choice to try to remain free.