Having a valid reason why some activity is intrinsically bad (e.g. fast food) is very different from disliking such activities because they are "beneath" you. Sports are widely loved and not intrinsically bad. (I'd even argue that fast food itself is not intrinsically bad, but that's a different discussion)
However, even expressing contempt for intrinsically bad activities can be interpreted as offensive and hostile. There's a difference between saying something is bad, and saying that someone is bad because they participate in or enjoy it. Making people feel bad for eating McDonalds is unlikely to make or keep friends and is therefore by definition a problem with your social skills.
However, even expressing contempt for intrinsically bad activities can be interpreted as offensive and hostile. There's a difference between saying something is bad, and saying that someone is bad because they participate in or enjoy it. Making people feel bad for eating McDonalds is unlikely to make or keep friends and is therefore by definition a problem with your social skills.