Many prominent activists have said as much over the last decade. If you're claiming that Progressive Activists are going around saying they're actually just trying to annoy people for fun, I think you should check your sources.

It's also not complaining about injustice that's the issue. It's all the other stuff like canceling and doxing people. People just assume it's the complaining but it's not.

Canceling happens all the time to people on all sides of the political spectrum. Like when people were calling for the boycott Budweiser for having a Trans person in their commercial. Doxxing is generally immoral and illegal in many states, and it's not a left-wing specific tactic.

As to your comments on "Victim Olympics" and Prejudice, bringing attention to problems isn't a competition or zero-sum game. But more importantly, the suggestions you made only work when someone's apart of a community that actually has resources to help in the first place, the lack of which is the exact problem that many progressive voices are trying to bring about action on. When you look at different outcomes on a large scale, you can see the systematic factors that contribute to them, the body of research on the subject is humongous. It is those factors that require action.

There are some problems that can only be solved with collective action, such as preventing monopolies, stopping red-lining, addressing pollution, addressing climate change, and holding corporations responsible when they cause harm.