Ant-Man was a decently entertaining caper, especially after the overblown ridiculousness of Age of Ultron earlier in the year. But you have to admit it had some serious plotholes throughout, especially when it comes to how complicated the whole thing was.
Behold - here's how it should have ended!
And that all makes a lot of sense. The plans were all incredibly elaborate, despite the end goal being fairly simple - steal something, destroy a lot of servers, get out. When you're so small you can access anywhere and then grow again, a small explosive device would have pretty much done the trick. Or, as it so well stated above, the tank Hank Pym carries around in his pocket.
Let's hope he never meets Batman...