Sadly, this is extremely frequent, and what's worse is that there are many people who take their word as gospel.
So many times, I've seen people discouraging others from buying certain games, because they'd seen people like "totalbiscuit" or "jim sterling" saying the games were crap, and so, so they made it upon themselves to deter others from playing those games, and spamming the game forums on Steam and elsewhere with idiotic comments and links to those influencer videos, while insulting developers, and so on.
What's worse is that many of these influencers make videos extremely lazy videos, with factually wrong information. And many people don't even bother trying the games themselves, and make up their minds. If "x" influencer says it bad, its bad. Never mind if there's a free demo available that they could try for themselves, it's crap, period.
I remember one indie game, where people kept posting over and over that the game was crap, because "totalbiscuit" said the game was crap, insulting anyone who attempted to say positive things about the game, and I ended up checking that "totalbiscuit" video, and it was frankly ridiculous.
He complained about the controls, saying there was no option to configure them (it was right there in the options menu!), he got stuck, and lost, because he didn't even bother reading a prompt that told him how to roll down (and obviously, he didn't check the map either), it was just plain ridiculous.
Pretty much everything he complained about was something that was explained during the tutorial, and he clearly couldn't even be bothered to read tutorial prompts, or the options menu.
I know I'm a grumpy old guy for saying this, but it's appalling that these people cost sales and money to talented indie developers, while making fortunes monetizing their sloppy "work", and while creating a mob of people that something resembles a cult.
Which reminds me, these are the people that Epic wants to reward with their store, with that whole "influencer" program.