This seems to be a common thread in discussion on the internet - one person says "I don't like X." and a bunch of people say that not enjoying X is immature, or that it's not that bad, or that they like X a lot, or that they can't see X at all.
And they don't seem to be providing this information for general cultural reasons, but in denial that the original person is "correct" to feel the way they do in the first place.
It's something I've seen repeatedly, that if unhappy people would just stop being unhappy then everything would be fine. That they shouldn't complain about people doing things they don't like - because if they'd just learn to like people doing things they didn't like then nothing would have to change, and everyone would be happy.
You don't have to agree with people who complain - if you feel differently then you feel differently. You don't have to stop doing the thing they feel unhappy about - that's your judgement to make. But to hear people expressing their feelings on something and then express anger, disbelief or scorn because they have those feelings strikes me as a basic lack of empathy.
It's an attitude that completely baffles me.