Don't take it personally dude, people talk shit all the time here. Doesn't matter who you like more or what's shown in the manga.
Personally I've been insulted by Luffy fans, Zoro fans and Sanji fans. And I think I am overall fair to each of these characters, but each fandoms want their fave to be the strongest so shit talk and insult is bound to happen.
And I'm sure some people really mean what they say lol, but most of the time they’re just having fun.
It is hard for people to accept that people have different opinions.