Fixing Insomniac's Venom
I loved Insomniac's Spider-Man 2 and if I'm being honest it was all great until Venom became a mustache twirling villain.
Venom has a great appearance, the fight was good, but his motivations was bad. Wanting world domination and pulling Web of Shadows and just the personality of a brick.
So here is how I would've changed Harry as Venom
TLDR;Dive into Harry wanting the power and feeling like Peter is stealing everything from him, the suit, his fathers love, any chance of survival. Have Harry's motivation then to take everything from him convinced that was what Peter wanted to do to him.