Avengers: Age Of Ultron - 10 Plotholes That Almost Ruin It

4. The Avengers' Follow-Up Plans Are Terrible

What is the first thing you do when you've taken down a heavily fortified HYDRA base full of intergalactic weapons in a country that is noticeably aggressive towards the Avengers (and as an extension, the entire West)? 

Why, you retrieve one item from the base and then down tools and go for a party, of course!

The Avengers have literally no contingency plan for guarding the HYDRA base in Sokovia. They're so short-sighted - or so self-involved - that they fail to leave even a skeleton crew to defend the place, let alone actually removing the Chitauri weapons and tech, or the AI that Tony Stark admits he saw in the base.

Instead, they just casually leave it all lying around, in an unguarded castle, so Ultron can go and find it as easily as if they'd plugged him directly into it.