u/Andiwonder03

I recently adopted a one year old golden retriever, his previous owners did not give him any kind of training. He come one the bed which we do not allow. He looks at us while we eat. He keeps chewing and destroying almost everything that he can find. He pulls a lot while walking and refuses to walk sometimes if he spots another dog or cat. Now the thing is that we have had dogs before him but this one’s just too hard to train. We give him treats, scold and hit if he does anything wrong. What do we do about it?