Razorfist's hate of anime stems from multiple different sources: First its more accurate to say he has a hate boner for all east asian media. He accuses multiple manga, anime, etc. of ripping off western media. Notably he called Beserk an Elric ripoff and GITS a blade runner ripoff. He also lives in denial that many Hollywood films are inspired by Akira Kurosawa. The Magnificent 7 and A Fistful of Dollars are western takes on Kurosawa's 7 Samurai and Yojimbo, this can be confirmed easily on the internet, yet Razor believes the former is horseshit and retorts to Fistful being a western Yojimbo by saying "Well Yojimbo ripped off a film noir so i don't care." Razorfists is a pundit for western superiority and he should be called out on it.
2. Razor is a contrarian. Anime has been popular in the west since the Internet's inception into daily life. not to mention bash modern anime for using computer animation
3. Razorfist wants everyone to believe that hes an alpha male chad badass, despite the fact hes spent over 10 years yelling on the internet about video games. The western anime fandoms has its moments of never ending cringe and often gets associated with very unsavory groups, therefore Razor can act like hes superior to such a bet subject.
4. Razorfist doesn't understand what pacing is. Apparently spending your life listening to nothing but loud heavy metal reduces your attention span to that of a goldfish. Razorfist bashes everything with slow pacing because he thinks only Noir and Silent Hill are suppose to be slow. He also throws this criticism at modern movies because he thinks being longer than 90 minutes is a problem. Anime naturally is drawn out and has slow moments thus draws his ire.
His hate for it is not jusstified and is why he'll just write it off as not worth his time, because Razorfist can't argue against it.