I don't care for new my little pony, prob more cuz I liked the original.
Do I have anything against the cosplayers or bronies, no. Do I understand the appeal? Not really, other then its a popular fandom. Other then that its not hurting me and I don't hurt it.
Now have I see a couple of fans that are the bad apples and set a bad example for the fandom? You bet but thats ANY fandom.
Take Lolita, I have met a few in my day who were just plain mean people, should I judge all Lolita by that? No! I have known too many who are awesome and really nice people who work really hard on their cosplay.
These days there are SO FREAKIN MANY things showing up, home struck, brony, marvel/DC, random anime you haven't seen, no one can be expected to be a fan of everything, and thats okay!
We can all agree to disagree on what is awesome to us. On the other end of things, if someone says they don't like something please take on their word, and not a challenge of "you just haven't seen the right episode"
I think of it like this, I don't like tomato sauce, makes my hand eczema bad, and never really liked coconut. People have said "oh well you HAVE to try it this way" nope no I don't. I will keep on avoiding those things, but I am perfectly okay with ya all eating it and enjoying it... some how... Do I understand how people can like those foods that taste like pain and despair to me? No not really, and I don't think I can, and thats okay.
Treating others way you want to be treated is always the best bet.
*side note, after 15 years of avoid coconut I found out, out when a restaurant gave me coconut shrimp by mistake that I had also developed a coconut, that shuts up the "try it try it" crowd, one bite red swollen face and it tasted terrible *