The Trouble with Humans — Christopher Anvil

PITY THE POOR ETs
Humans -- there's no understanding them, and no dealing with them either. Or even their planet.

Consider the invaders from a blithe planet where the weather is always mild. They land in force and their weapons are more powerful than those of the primitive humans -- but they've never before had to deal with below-zero temperatures, flash floods or tornados -- not to mention volcanoes and earthquakes.

Then there were the aliens who gave those belligerent humans the "gift" of TV-like devices which would show anything anywhere on Earth. But instead of that starting a war, the humans improved the gadgets and turned them on the aliens.

Humans don't make sense, they don't fight fair, and they're making aliens throughout interstellar space think seriously about pulling up stakes and moving to another galaxy!