Express your dislike or disappointment for whatever game and fans label you a troll regardless if you give legitamate reasons. When you ask them 'what makes this a great game in your opinion?', they can never give you a straight answer or engage you a decent discussion but would rather have your posts deleted.
If a stranger online expresses dislike for any game I'm enjoying, I can respect their opinion and engage them in a friendly debate rather than feeling offended and feel the need to label them a troll.
The insane backlash over game reviews like Resident Evil 6, Uncharted 3, Skyward Sword were just individual opinions of the reviewer and have no effect on a fan's enjoyment of that game. Why so emotional?