I'll even admit that over the years Venom has been a poorly written character,especially in the comics. You guys are right. His motivations for hating Peter are really paper thin. I loved McFarlene's version of him and thought he had some cool appearances,but once the 90's hit Marvel rode the Venom train for all it's worth. He became so popular and he was everywhere,and story or motivation with the character became non existent. It was all about flash and style with Venom. In fact,whenever I read a Spidey comic with Venom from any point in the 90's,you can easily tell he's just there to sell comics. He had no plan or anything. Venom would appear and threaten Spider-man,they would fight for an issue or two and then he would lose or go to jail or whatever and nothing would come of it. Then,a few months later when Marvel felt they needed to boast their sales,he would appear again and repeat the same actions. Why did no one there ever come up with a good storyline for him or even a plan?! Have Venom kill Mary Jane or Aunt May or even Spidey himself! Just give him something to do besides appear and then get beat by Spidey. But,as I've said,Venom in the 90's was nothing more than a cash cow for Marvel. And don't get me started on Carnage.
But the thing is,and I guess this may be just me,but I see alot of potential in Venom and the symbiote. I absolutely love and adore Venom and it's more than just because of how cool he looks. I mean,just look at how cool,original and interesting the whole Venom/symbiote story is! I also love trying to explore the person Eddie is and how "damaged" he is inside and how the symbiote fed off that. There's alot of cool stories and such that can come from it and I think in recent years attempts have been made to flesh out Venom. I look at the SSM cartoon as a prime example. That was the best version of Venom I've seen,as far as motive goes. Making him Peter's best friends was genius and really made it personal between the two when Brock did finally get the symbiote. And I think Spider-man 3 did some good things too. The only problem is they had too much going on in the film to explore Brock and what type of person he is,and how much of a great villain Venom is.
I realize that not everyone will like him and view him in the way I view the character,but my point is that he's alot deeper and more interesting a character than what writers and such have done with him. And that's a shame.