>>149795884
This is all basically true, and Marvel editorial in the later 90s, possibly the EIC, didn't like Venom as a hero and they tried really hard to flip him back to being a villain the moment the sales of his minis dropped to a point where they could justify cancelling them.
But it was the next generation of people at Marvel in the 2000s under Quesada who actually tried to kill Carnage and replace Eddie Brock with Gargan as the new Venom, it was people like Bendis and Millar. And most of them wouldn't even let Gargan Venom be a cool bad guy or a threatening one, they kept using him as a jobber.
Then in the 2010s we got Carnage back, with edgier writers than he usually got in the 90s, but several writers who assumed he has to be a redneck because he has the same name as the redneck in the Simpsons, and editorial didn't correct them or didn't even know themselves that he's from Brooklyn. And they had Flash as Venom for years, with another attempt to make Eddie a villain, and culling a lot of the other symbiotes, only to suddenly reverse course and make more of them than ever and start giving them to random other characters from the Spider-Man cast, and also Black Widow.
In addition, for years we basically just knew as much about the symbiotes as we needed to know, then successive writers went all in on adding more lore, backstory and history to them, a lot of it is awful because of who the people writing it are, and it's just ten years or more of layering convoluted crap on top of more convoluted crap.