system
Given the following post, respond as if you're commenting on Reddit:
human
[the Hulk] Progression from thor ragnarok to avengers movie

Wasn’t he supposed to be world breaker hulk after/during being in sakaar?  He seems so underpowered for the avenger movies.  Is there some event in between that I missed or did they not want to go to deep into his story line?
gpt
No. The MCU didn't do the World Breaker Hulk storyline, it just used some elements from it. 

While it's possible he got stronger, or at least more developed as an identity having been transformed for so many years, none of WBH's defining events happened to him.