So enlighten us Mr.Shakespeare, we need those reading skills of yours
Don´t have to be Shakespeare, just being honest is enough.
1) Blowing every fluid in his body in Fishman Island and putting the crew in danger in hostile territory
2) Butting in between Nami and Jinbe and telling Jinbe to commit suicide when Nami herself did not blame Jinbe whatsoever, all because he wanted to look good in front of her
3) Kicking around a helpless head (Kinemon)
4) Saying helpless children have nothing to do with them, yet he immediately jumps in when hot women are concerned
5) Feeling Nami up against her will
6) Getting tricked in Dressrosa, another hostile territory
7) Not trusting the crew and deciding by himself to leave to WCI and putting the crew in danger against a Yonkou
8) Attacking his captain in hostile territory despite Luffy´s condition
9) Escaping from reality to a marriage to a girl he barely knows, and when that falls flat and it becomes apparent he was tricked yet again, instead of owning up to it, he despairs and shows his mental fragility.
And notice nothing of these has to do with his strength or lack thereof, it´s a different issue. If any other character would have this track record, you guys would have long jumped on it, but since it is Sanji, people who point this stuff out have to be haters for the sake of being haters.