Take Doctor Who, a show and fandom that meant a lot to me for years. The new series, which keeps shifting more and more away from everything I liked classic DW for, now defines what DW is to people. The classic 1963-1989 show is just something in the misty dawn of pre-history which led up to new DW. Staying true to the old show isn't a priority. All this distorts fandoms.
The contingent definitely already exists, so the phenomenon of making fun of the show to the exclusion of anything else about it is nothing new, even amongst fans.
That's true, but I consider myself a hybrid of sorts