This question has been burning in my mind for a few months ever since I had a debate with someone who dared to say I'm not a true fan because I didn't share his views. He said that a being a true fan means you have to love every season. While that would be a good response in theory, its not quite my definition of what being a true fan means. After months of deliberation, I have finally been able to put my definition of a true fan into words. Note: I'm also going a little in-depth about my issues with MegaForce.
Some have asked me why I keep watching if I don't like what the show or franchise is doing. My answer is and will always be this: I keep watching because I'm a fan of PR and have grown up with the series as it too has grown. Plus it was my introduction to the world of tokusatsu in general. My point being that I'm not going to let a bad season or two throw me out of the franchise. Heck I stuck around after Turbo, Overdrive, Jungle Fury, and Samurai. Does that mean I'm not going to point out its faults when I see them? Of course not, because I believe it can show more of what its learned throughout the years. I complain because I care about the franchise since its been a huge part of my life. Even after discovering Sentai, I continued to watch PR and for the most part I didn't let the Sentai versions color my thoughts/opinions of their PR counterparts.
In short, a true fan isn't someone who says they like a series (anyone can say that), they must be willing to call a franchise on its screw-ups. Sorry if I went too far into the MegaForce tangent.