Why did Carnage hate Venom?

I'm curious to know, why exactly did Carnage develop such a deep-seated hatred towards Venom? Was it a rivalry stemming from their similar origins, or was there some personal grudge that drove Carnage to seek vengeance? Could it be that their contrasting ideologies and methods of dealing with crime clashed, leading to an inevitable confrontation? Or perhaps, there's a deeper, unexplored reason that connects their pasts in a way that's yet to be revealed? I'm eager to hear your insights on this intriguing dynamic between the two symbiotes.