I mean, you can do as Cunning did, and say "I don't like this part as much because (list of reasons)"
Do not do the whole "oh you're not a true fan because you don't like this part" or the whole "don't be criticizing innocent minors" or calling people cowards... and all... well, you get the point.
Anyways, don't go accusing minors of criticizing minors (I'm sorry Cunning, but this is just... wow). I can assure you, Cunning is not the massive 50 year old man in his mother's basement you think he is. I can probably safely say, I'm the only person here who's NOT a minor, and I'm only 19.
My point is, just..... chill. Don't go after other users for not liking the same Part as you. Don't call someone "not a true fan" just because they have a different view on things. Most certainly, don't go calling out people for doing legitimate criticisms/reviews on why they just do not like a Part.