Proof is in the pudding.
Indeed it is and the proof shows that Ukraine intercepts a large number of Russian missiles with air defence.
Whilst Russia intercepts a lot of Ukrainian weapons with the intended targets.
The Russians have maybe shot down a single stormshadow out of all the ones that have been fired.
They don’t seem so good at intercepting modern western cruise missiles.
This all ignores that Ukraine managed to get TU141 drones that look like they have the radar signature of a truck past Russian air defence to hit targets within Russia.
Your true believer enthusiasm is endearing, but it doesn’t win wars.
They have a single photo of a single storm shadow.
Because they haven't shot down anymore, I presume they will move it to 100 different sites to try and claim they have shot down more like they did earlier with the downed drones.