Saw it yesterday, I liked it very much, I think the cirtics who interpreted this as a communist propaganda or a movie glorifying revenge vigilantism missed the point. It's definitely not black and white nor it should be but when the movie was finished I didn't have the feeling at all that this would encourage anybody to anything. It just deals with current but also forever existing societal problems and shows the consequences of a fukked up system which threats people on the periphery of it as pariahs and freaks, neglecting support from them.
Yes there is a fair amount of criticism toward neoliberalism and any kind of ideology what thinks governmental/state support to the treatment of people like Arhur in the movie is negligible and basically if they create a good economic environment for the middle class/rich every problems will be solved but it doesn't opposes communism as a solution to that. It is bleak cause it doesn't really give an alternative of how the system could be better apart from the single fact that showing more support and care toward people like Arthur or even for all the "clown protestors" would be better but I didn't find this a problem. These are ever existing problems you can't expect a movie to just show a solution to them. That doesn't make the very presentation of these problems inadequate. It shows what surely DON'T do and that's enough imo.
Also the fear about "incel violence" was clearly a moral panic BS from people who haven't even watched the movie just tried to be smart based on trailers and second hand information. Hatred toward women isn't even present in the movie like that, it is centered around mental health and the fukked up way how the system handle people with mental health problems, Arhur's problems with get himself someone are present but they are a marginal part of the story as opposed to some of his other problems imo and they are never presented as some general hatred toward women.