From my first-hard experience of incompetence and incoordination of different Russian intelligence agencies and branches (mostly internal, though) - yes, "we" are that stupid. Aggressive, resourceful, but stupid indeed.
Calling some person a "spy" without any investigation is stupid as well.
As we all know Skripal in not a spy for a long time (former - maybe), but he was called "Russian Spy" from the beginning of all this story. Bullshit all over the place.