It's not just AI, it's everything. Romantic rivals, celebrities, sports teams, fandoms, choice of IDE or programming language.
It's a social evolutionary strategy to neg and gossip about people and things you don't like or are jealous of. It's low energy, has little downside, and can reduce the fitness of rivals, especially when done in group settings.
The algorithm has co-opted this part of our primate brain and turned it into ad dollars. It's also twisted discourse to be sour and negative by default because it activates these perverse reward pathways.