I think it's like when the local cops hate when the FBI shows up and takes over their case or when the FBI keeps info from the CIA. SHIELD don't want Tony Stark coming in and taking over if they think they can handle it especially with what's been going on with the Avengers in the last year or so...Lash couldve basically ended the season. I don't like how they did him. Hopefully he's still alive.
And I don't see how the avengers wouldn't be involved in bringing down hive
He's been a bigger threat than Loki.
The international intelligence community in the MCU is ass cheeks.. And this is coming from a marvel stan