Welcome. quick answers:
1 buster eats everything because he's a bulldog. Try nylabones and kong toys. bullys often eat stuffies.
2 buster is teething so he will bite. Tell him NO and give him something appropriate to chew on. He'll outgrow it in a couple of months
3 no, you are not the only one. It's pretty common. He'll slow down a bit between 2 and 3 years old. they lie when they tell you about bulldogs being couch potatoes. Many are not