i think losing to gambling is not a reasn why people hate bitcoin! maybe they hate bitcoin because they got scammed by HYIP, PONZI or mining sites that they had trusted. i can also say that one of the reason why they hate bitcoin is because they don't have enough information about it or they don't have money to invest.
I agree it is not losing to gambling that people hate bitcoin. It is due to their hasty decision to jump in to greed triggering investment like HYIP, Ponzis and obvious scam schemes. Another thing is that they were driven by their own greed on buying bitcoin at it's peak thinking it will double or triple in value in short span of time.