I'm not, Avengers didn't really have a threatening, imposing Villain like Ronan. Loki was hardly threatening, he got owned by a lot of the members of The Avengers, his invasion also didn't really feel like a big threat. if anything The Chitauri were better villains than Loki was in that movie. Also, looking at each team, Guardians had a far more organic, and dynamic team too. None of the Guardians felt like they were trying to be too nice and "friendly for everyone", I mean Drax is a Murderer and a killer, Rocket is a shitlord bounty hunter, and Gamora is an assassin daughter of one of the most powerful and sadistic villains in the MCU.
You see? I love The Avengers so much for basically being the huge big risk that payed off and allowed Guardians to come in, but really? honestly I find it to be the fourth best MCU movie so far, because Winter Soldier, Guardians and Ultron had far more interesting, and way cooler character dynamics, threats and main villains.