I would say a good argument for communism is the worsening side effects of capitalism. These problems simply cannot be fixed in a capitalist framework because they require global cooperation and capitalism is based on competition. Problems like over exploitation of natural resources (overfishing, carbon emissions) and the failure of the market to adequately provide services for which there is a fixed level of demand (housing, education, healthcare. The scale of college and medical debt is getting ridiculous). Many other problems like these.

The solution is more democracy and yes common ownership of the means of production. People are just allergic to the specific term of class struggle. but it doesn’t change the meaning - the ownership/ruling class benefits from the status quo even as everything gets worse. They will not give up control without a fight, and as you said they will use every tool, from propaganda and legislation up to direct violence to maintain that control.