Unfortunately, Hulk is one of many characters to get their supporting cast, power levels, stories, and mythology/lore/history tarnished and butchered in the MCU. They butchered arguably the greatest Hulk story of all-time, PLANET HULK. They pretty much discarded and/or ruined Abomination, The Leader, Betty Ross, Rick Jones, Samson and all of Banner/Hulk's supporting characters.
They did the same to Thor and all of his supporting cast of characters - Skurge, Warriors 3, Sif, etc. Tarnished and butchered all the mythology and lore of all those characters & realms connected to Thor. And basically did no justice to Walt Simonson's stories, particularly the Surtur Saga.
It appears that all the MCU cares about is the puny human characters, not gods and monsters. They're not interested in portraying faithful & respectful adaptations of our favorite characters and their mythology/lore. It's honestly sad. Looking at the art of a lot of these films, it's disgraceful that they had the potential to be truly epic films... and instead they chose to waste it on mediocrity.
If I was at the helm of the MCU instead of Kevin Feige, it'd be much different and far superior to what we've gotten. Because in my MCU, films like Thor: The Dark World, Iron Man 2 & 3, and other lackluster MCU films wouldn't exist.