The attack on Venezuela seems to have used a cyber attack to take out the city’s electricity and over 150 aircraft. The US suppressed Venezuelan anti-air capability by suppressing and destroying them. Many military targets were struck, most by relatively small and targeted weapons, and most anti-air assets. There wasn’t an attempt to more broadly destroy Venezuela’s military capabilities. The US may have used new one-way attack drones that are cheaper than missiles.
This US operation represents what is possible, but also required luck. Shoulder fired anti-air rockets were launched, and one helicopter was hit in the leg three time and still managed to land the helicopter on the attack. If those hits hit the helicopter or person a little differently, the operation may have gone differently. The US may have had to send more waves, giving Venezuela more time to respond. Success was not inevitable.
The Maduro regime is not gone. The US took the leader, but the rest of the regime stayed in place.
The attack was not authorized by Congress, and therefore unconstitutional.