Most people or news channels that criticize bitcoin and altcoins do so because they do not understand what bitcoin and altcoins are. Why it has become normal for people to judge things they do not know they do not even think before publishing articles that criticize bitcoin and altcoins. You can see some governments that today say they will support bitcoin and tomorrow are in the press to criticize bitcoin. For people who own banks and certain governments who want to have total control of all their citizens so that their people become enslaved to their system, they do not look at bitcoin as a good thing. I myself do not watch certain news channels because they are news channels manipulated by the government or are manipulated by the elite of the political party that commands the country
I strongly agree on your opinion that, most people or news channels that criticize bitcoin and altcoins do so because they do not understand what bitcoin and altcoins are. And adding also my opinion that, there's some news that calls bitcoins as a "BUBBLE" which can burst anytime, but I don't think so. Perhaps traditionally only the hard paper money is considered as currency and digital currency such as bitcoins are assumed as fake or scam currency. In addition, media can be influenced easily, And the people who control it are the big politicians and the ones having big business branches thus, It's highly likely that they can influence media the way they want and also it's not weird to hear a news where you see people paying money to make such news.