I think I honestly hate it more when good content producers get a taste of the money they can make and that becomes their entire focus, instead of someone producing good content with money already in mind from the start.
There's plenty of examples to name here, but Pewdiepie is good enough. He got a following for being genuine. Now he's raking in the money and he's forcing himself to pump out videos that make no sense just to keep the money flowing.
On the other side of the coin there are also plenty of YouTubers who create good quality content and have a decent following, but who got started because they wanted to make money from it. There's nothing wrong with that and people can't 'tell' if someone does that. What people can 'tell' is when someone is trying to force their mediocre content down your throat just to get views.
YouTube can be a very good business opportunity if you have a talent for creating good content. But no matter how good the content, it will take a LOT of time before you are able to live off it. And that last part is what a lot of people don't understand. Unless you strike gold by accident, it takes nothing short of years to break the 3 figure monthly income.