Lance Stroll was seven tenths slower through Turns 5–9 than Lando Norris. In the wet, that's the difference between pole and eighth. And by the time he realized it, the rain had already decided his fate.
There's a moment in wet qualifying where a driver knows the lap is gone. Not blown out — just gone. For Lance Stroll at Hungary, that moment came somewhere between Turn 5 and Turn 9, in the section where the track tightens and the car has to dance. By the time he reached the final sector, he was already seven tenths behind Lando Norris. The rest was just confirmation.