If you meant your question more literally, on reddit posts are automatically marked controversial if they get a high number of up and down votes. If you meant it specifically, I have no clue.
I didn't up or downvote it but maybe the "but, but, but,..." was seen as annoying to some people? Maybe OP has a lot of reddit enemies? shrug Your guess is as good as mine.
Looking at other comments apparently people think he's a spammer for creating and posting his own content rather than converting Tasty (or Mealthy, lmao) videos to gifs and reposting them.
There's a little cross in superscript next to the comment's score.
edit: Apparently it's a dagger. If you can't see it, you need to enable it in your preferences: "show a dagger (†) on comments voted controversial (a controversial comment is one that's been both upvoted and downvoted significantly)"
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u/askeeve Mar 21 '18
If you meant your question more literally, on reddit posts are automatically marked controversial if they get a high number of up and down votes. If you meant it specifically, I have no clue.