We measure success or failure of such economic policies with statistics, not by political opinion polling - Yes. Hence we need to check the data to see if worked instead of picking political points like blood of citizens or Gujarat riots.
Over 100 people have died due to demonetization scam[1]. It is not an opinion, they are not even just facts and statistics, 100 real people have died and their families have been destroyed. Let that sink in.
[1] Modi ji gave immunity to Politicians, so Political parties can deposit unlimited amount of cash tax free. I thought demonetization was a scheme, but it turns out it is a major scam.