This, HH is objectively terrible in essentially every aspect besides the animation and some of the voice acting. The dialogue is terrible, the pacing is terrible, it's not funny and insultingly obnoxious, most of the characters are trash, the color is vomit-inducing, etc.
Alastor's shitty little exposition dump provided by Vaggie is my favorite example, because in no universe is having some character go "dude he killed a BILLION warlords and RECORDED it" with basically no prompting good, natural buildup to an evil character. Even the basic formula of just "who is that guy? lol" followed by someone else sucking them off rent-free for almost a full minute is inherently god-awful and artificial, but it's okay because so is the entire pilot in terms of its writing.
The only reason why it's gotten so many views is because there wouls definitely be forty million brain-fog addled morons' worth in 2020 that would find this good entertainment. The bar for quality these days for normies is about one foot off the ground.