DKR was Bieber trying to be Maynard
Avengers was Justin Timberlake being Justin Timberlake.
I'd rather listen to Justin Timberlake than Maynard anyway, much less from an imitator. Which probably explains why I like the Avengers better.
What I like about the Avengers is that it is well-written. One of my big complaints about action stunt spectacular is they have a $100 million budget and they can't find room in the budget for a decent writer. That's what makes the Avengers better than say, the Transformers.
I wasn't a fan of the third act either of TDKR, and I think it went to the safe "well,it's a comic book movie" cop out when it was clearly trying not to be one for two and a half films.