Likely it's because Ralph is actually not a completely reviled failure in his parents basement. I mean, think about it for a second, you're a fat 'film critic' who makes shitty content on YouTube, and has been doing so for almost a decade with only just a bit over 100k subs, you're reviled by the majority of people and as fun to be around as the bubonic plague, dropped from publications for being malignant, and are basically the Jim Sterling of film, yet still more disliked all while living in your parents basement, and you see Ralph. Kid's doing what you want, people like him, he's making a film, going to school, and despite being over a decade younger than you has over 3x the subs you do. Wouldn't you hate him too? He wants to be Ralph, despite never wanting to admit it. So he'll toss insults from a distance, hide behind the words he finds from that thesaurus in his parents basement, and tell himself how much of a success he is.