I don't count this as double standards. Sanji is hella flirty but he never tried getting intimate with a woman without basic introduction and getting the OK sign. These are completely different scenarios.
I understand the character type (Sanji being to poster child of it) but no amount of explanations will erase the fact that in his introduction he hugged and tried to kiss her without consent. That's not good person behavior.
I'm no prude. There's plenty of pervert comedy characters I find funny but the Victor dude was just a creepy rapist. This is not how you do comedic perverts.
The yuri route escalated hella fast tho.