When I tell you that I have read fanfic characterizations so OOC that they'd classify as an original character, trust me I have read THOUSANDS. But you know what I don't do? :) Tell the author of those fanfics that they might as well classify that character as an original character if they're going to write them like one. Because that's fucking rude. People don't owe you your preferred characterizations. The back button is free.
You can always do what I do folks. Start reading, realize mid page it isn't for me and exit the fic. It's so simple! And you get bonus points because you're not acting like an asshole:)