Training my dumbass dog

[SuperiorDG]

Put him in a crate when you are not around, at least until he grows up a little. Put out of his reach anything he can chew on. And lastly, get a remote controlled shock collar and follow him around and when he tries to chew on something shock the shit out of him, same with the biting.

[Scanker19]

I took mine to the training facility over by the 8th street walmart in Colorado Springs. Haven't had an issue since.......

[Mazin]

Put him in a crate when you are not around, at least until he grows up a little. Put out of his reach anything he can chew on. And lastly, get a remote controlled shock collar and follow him around and when he tries to chew on something shock the shit out of him, same with the biting.

Crating is a good start, the shock color is not. I know members will argue the fact but I dealt with my dog having lymphoid cancer and would not wish it on anyone.
It does just sound like separation issues and the fact that he has been jumped from place to place in his what 3 years he has been alive? 8 months is not enough time to work some of his fear's / issues out. Crate him when your not home, it also provides him with "his own home" which will lead into more of a sense of security for him (less anxiety). Just make sure you never ever discipline him while he is in his kennel (I.E. yelling or trying to pull him out) if he runs into it after doing something wrong just shut the door and wait a while.
I commend you for the steps you have taken so far just keep at it and rememeber dogs are like kids, they are both wild animals that need training

Btw A harder bite while playing is a sign of frustration, try a different game or when playing a fetch like game make him drop the toy at your feet before you will take it.

Just my $.2