Yes, it is difficult to take out the leader of a world nuclear world power.

Especially one as shrewd as Putin. Especially when you're expecting the EU to do it. Not sure why this is a surprise.

The world is not an action film.

This.

Never mind that they tried a month ago with the drone attacks.

How would this work exactly? The most protected person in the world, thousands of km from hostile borders, in the city with the world best AD surrounded, by bureaucrats who, if anything, think Putin is too soft on the West.