lol, good luck! You CAN make this situation better!! don't give up!
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now,
how long of walks is this puppy getting? 5 minutes? 10 minutes? 30 minutes? 60 minutes?
How many times a day does the pup get this walk?
Does this dog get a chance to run full speed? how often? how far?
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How long is pup home alone each day?
(just trying to rule out factors which sometimes contribute to destructive dogs)
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How much exhaustive play time is this puppy getting? games like vigorous tug, or fetch for quite a while, etc etc.
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How many times a day, do you set aside a few minutes to teach the dog a trick or a cue? ("mental excercise")
the more we know, the better we can all help you solve this! i've had problems with my dog, and others here helped me see some things i could change to help my dog.