In my (admittedly limited) experience, management at Google listens very carefully if you say to them "I don't think I'll be happy doing that" or "I'm not happy

In my (admittedly limited) experience, management at Google listens very carefully if you say to them "I don't think I'll be happy doing that" or "I'm not happy doing what I'm doing." The thing is that you have to be the one to say that. If you let them move you around like an interchangeable cog they will. If you help management find you a job/project you'll enjoy, you'll probably find one.