"False narrative", what's false about it? His good overall performances? You're welcome to try and list all the great overall performances he had so far. In my opinion, it doesn't reach more than 10. If you think differently, go ahead and discuss.
Is it people blaming Valverde for Dembele's individual technical deficiencies?
Check out the reactions to the 4-2 Sevilla game:
http://www.barcaforum.com/showthread.php/13639-11-Ousmane-Dembélé-old-thread/page847
There are people literally blaming Valverde for his atrocious second half performance.
I don't see how my narrative is false.
If that second half performance was played by any other player, say Gomes, you all would have hounded him with insults, not deflecting blame towards a manager for things he has little control over (a player's mentality and technical ability).