I think there are two sides to this. Yes, online aggression has probably peaked in recent years with the rise of worldwide pro far-right misinformation campaigns, no argument there. They were specifically targeted at the people more vulnerable to buy into hate speech propaganda.
On the other hand, I have personally noticed more constructive discussions, even after I deleted most of my anti-social media accounts and substantialy decreased my usage of Internet forums in general. It seems there's some positive trend in the middle of all that.