HN is a place I spend a lot of time because the culture here is reasonable.
To me, saying "Hey I like Edge, it's not so bad" is pointless shit-stirring. It's looking to start trouble for no real reason.
It's a low value comment. The guidelines actively discourage that, so it's not surprising that it would be downvoted, having nothing to do with "disagreeing" per se.
If you have something meaty and thoughtful to say that disagrees with the majority view, the HN crowd will give you a fair shake. Jumping into the midst of a discussion where everyone is saying "This is junk!" to say "Well, I like it!" isn't thoughtful or meaty.