Sanji fans, unfortunately most of them are not able to listen to arguments or counter positions that criticize Sanji in any way, even though he is a character that has major flaws aside of his chronic pervy attitude and jealousy of others.
The most irritating thing they do though, is his fans use their Fanon headcanons as facts instead of just their own personal interpretation while totally ignoring the Canon evidence. I can't say stuff about the others because they don't seem to be as bad as Sanji stans