I can't believe (well I can, but still) that people are complaining about getting something for free. I don't care if it's 1 unrefined dilithium, it's still free.
Without more information it's impossible to say, would need to know your specialty (tac/sci/eng), what ship you were using, equipment and all that jazz. It's possible it's an equipment issue, it could be a build issue, or anything else for that matter. Without more info, impossible to say.