For me, it doesn't work that way. I can critique the problematic and still find the good things to love. Or I can quite often, which explains how I spent so long focused on the women in Stargate fandom. :) I see how it doesn't work that way for some people, believe me! But I did want to point out that some of us try to balance it out and deal with both.

Also, there are some people that focus on only the negative, and the critique, while useful, can get to be a little too much after a while.