[Ju]

• Finally, I was promoted as a department head at the expenses of breaking up with my boyfriend as I've been too busy at work.

I purposely make a sentence with at the expenses of. Is it good English writing? Any mistake?
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For some kind of well-cooked lamb, beef...., they still carry strong flavor or scent of itself which a lot of people cannot stand. How should I describe this flavour and scent? Shall I say "gamy", any other better word in common?

1. This lamb/beef tasted gamy
2. This lamb/beef scented gamy
3. This lamb/beef is having strong scent of game

Are the above sentences acceptable?
How can I make them better?

Thanks