Even as someone who shares the OP's attitude, I think you've got a good idea going on there :)

I just complain a lot because it BOTHERS me and I don't especially want to force myself to not say anything to my fandom friends when I'm bursting to and when I have so many arguments about my dislike, and I can't help start predicting bad stuff once I've been burned one too many times (not to mention, having low expectations and being pleasantly surprised is way better than having high expectations that get dashed). I never do it to actively ruin someone else's enjoyment. Never ever ever tag my hate, etc.

Actually, rule of thumb: unless you really, really, really want to be involved in the fandom of a show you like and feel like you're restless or unsatisfied with watching without a fandom, stay away from it and just watch the show on your own. It's usually better that way.