He used to terrify me the first cple of times I tackled him, and then again in G rank. I remember duo-ing him online in high rank and again in G rank with gegz. I could very clearly feel my heart beat accelerating, had trouble breathing regularly, and my hands suddenly started dripping with sweat. The rage jumping+explosions was so chaotic and random and lethal.
Eventually, he just becomes another monster which you read easily. Get better armor and stick with it, you'll figure him out. Or get online and hunt him with a group, takes a lot of pressure off and helps in looking at him and understanding how he telegraphs what moves. But yeah, he's kind of a doozy at first.