Actually, you know what? Fuck it. Here’s what Clint’s been doing during IM3, TtDW, and CATWS:
He was sent to have a nice vacation in Hawai’i, where he was supposed to recover from being possessed and turned into Loki’s sockpuppet. While he’s there, he had a side mission of trying to recruit Nani Pelekai and David Kawena, because they apparently have a lot of experience with aliens and that would be hella useful. Of course, then he finds out that Cobra fucking Bubbles - the man, the myth, the legend - is working as a social worker there, and the retired SHIELD legend doesn’t take kindly to Clint doing anything that might mess with the Pelekai family.
So Clint’s been spending his time babysitting Lilo, learning how to surf, and trying not to have a panic attack every time Stitch talks.