Help, I'm so puzzled about this horse...?

A little info about me - I am 17, I've been riding my entire life, showing horses competitively for 6 years, and training horses for about 4 years. I've got a mare and a gelding half brother and sister that I have owned since they were 3, trained them, and now we earn ribbons on a regular basis. Now I just recently got another horse that I plan...or had planned - on doing the same with. He's a 17hh super stocky '05 paint horse gelding that I have known since he was a foal. I always loved him while he was out on his owners pasture(I rode his owners horses). This past summer we bought him. He was supposedly broke by the owners son in law who's a local jockey but honestly I don't consider throwing a saddle on him and running him down a field much training at all which is exactly what he did. Well now I've owned him and been riding him for about 4 months at my place. Our bond feels completely torn. I've dealt with plenty of horses and never have I found one this...dare I say stupid? He bites constantly no matter how much and how many different ways I try punishment and reward. He also cribs and paws but that's not the biggest concern. He becomes very violent when you try to lunge him in a round pen or on a line. He will charge at you and then kick out straight at you. Even if you get out of the round pen he will do it to the metal panels. I've been kicked in the face(and spent many days in and out of the hospital) so I cannot tolerate this what so ever. Now if you set him loose in the arena to run around he won't do anything. He's lazy as can be. You ride him when another horse is in the arena, he won't do anything either. You can kick, whip, spur, whatever he won't do anything. He isn't overly desensitized to spurs and whips and I don't want him to be, he reacts perfectly fine when I have to use them when it's just us. Now when we ride alone some days we have alright rides, other days we end the ride sweaty and in tears. We can't get anywhere. You teach him something, he's got it down, then quickly forgets it no matter how consistent you are. Oh and when you go out of the arena he feels like he must bolt off out of excitement and start bucking, I try taking him down the trails at a walk all the time and he still gets overwhelmed. This horse didn't even buck when he was first saddle let alone while being rode. Sometimes when he bolts off he doesn't even have an aim he will run straight into the bushes and trees. He spooks at the most random things that he's been desensitized to and has seen before i.e. a riding helmet and rider! Then to finish the ride off he likes to pull the entire box of grooming supplies out and throw it across the driveway if I'm not super careful. He will also chew his lead rope till it's in pieces and he's untied as well as his trailer tie. The darn horse needs a pacifier. I'm just so fed up with him. I love this horse but I hate him just as much! Help? Should I restart him, we need some major re-bonding as I don't even feel like he's the same horse out of that pasture at his old barn(he was never even worked with back there though). I can't stand not being able to look at him the way I do all the other horses I own and train. I get done with them and almost always do we feel content with what's been taught and where we stand. Please any advice? And if you are going to tell me I should sell him please at least make me feel like I'd be making the right decision. I couldn't stand him ending up in the wrong hands.