Correct, no normal adult would like him. Of course teenagers of this generation know him, he literally appeals to GenZ. But here's the thing, once adult maturity kicks in, the draw of PewDiePie fades away.
I tend to follow those who've actually lived a couple generations, and know what real life is like, not those that were born yesterday, and like to make funny faces and goofy sounds like their 8 years old.
Another person to stay away from who's popular with kids, is JackSepticEye. The name alone should tell you what you need to know. Hes just as nuts, makes crazy voices, sounds, silly faces, and does a stupid whippish top of the morning to you laddies intro.
Markiplier who's also famous, and is doing his own film movies now. I would say he mostly caters to children, due to his crazy energetic mouth noises, gibberish, and his own invented slang words. Having said that, he does have some appeal to adults.
Mark has uploaded videos before, showing how much he cares about others, videos about his mom who means the world to him. Overall, hes a really nice guy, who seems to have a nice heart. So, I tend to respect him when hes normal.
I tend to watch YouTubers who are less popular, and act normal. As such, I love watching Fooster's lets plays, he's fun to watch. When he plays with his friend Fisk from the Netherlands, those 2 are so funny together. lol