frankly, there's very little reason to read philosophy other than that which is rooted in dialectical materialism, unless you have a solid base and want to understand how and why other philosophies are wrong. general criticisms of entire philosophies are literally unavoidable due to the infinite complexity of reality, but you should understand the criticisms of postmodernism from the viewpoint of diamat before you truly believe them. imo these would be:

0. this should go without saying, but there is almost no reference to dialectics in most of these works. if there is, it expresses no understanding of dialectics.

1. claiming that there can be no ideology. there are many variants of this claim, what i tend to see today is skepticism towards ideology of the masses or of society at large. diamat understands ideology to be central to human experience

2. a laser-focus on the realm of the specific over the general. understanding the general or essence is actually more important to not just existence but also ideology development. the vast majority of western academia revolves around this. another way to think about this would be that it favors analysis over synthesis. this is also true in its analysis of society, which leads to an individualist understanding as you said.

3. fundamentally subjectivist. that is to say, that it often supposes that because we can never have 100% certainty regarding our understanding of the world, it brings every conclusion (even its own) into question. diamat understands that there is an objective world, and that while there is subjective human experience, there is an objective chasm between that subjective experience and the objective world. human struggle is to constantly make that chasm as small as possible, even if as it grows in response to human struggle.

4. like you said, an important criticism of postmodernism is that it's idealist. more specifically, i would call it pretty consistently engaging in mysticism. because it's fundamentally incorrect (due to the previous 4 points), it will usually pose many (usually inane) questions and come to the conclusion that reality is unknowable and no certainty can be had regarding reality. this is sometimes followed by a (non-declarative, as always) suggestion that supernatural or mystical elements are the reasons why things are the way they are. even when literal mysticism doesn't occur, the vast majority of postmodern writings are also written horribly, in such a way as to mystify the topic at hand for the reader rather than to lead to any meaningful conclusions.

5. this is a bit of addendum, but postmodernists tend to either think that all of society is strictly cultural, or that the superstructure is always dominant over the base. this is why there's a lot of obsession over things like language ("language is central to thought because we all think in language, therefore language and culture are central to human development"), as opposed to the diamat theory of knowledge.

of course, an important element is its history and why postmodernism exists as a superstructural ideology in the first place. postmodernism is a reaction to both the founding of socialist states (chiefly the USSR) as well as a response to both world wars that were ultimately caused by capitalism. it became quite difficult for capitalists to talk about how idyllic capitalism was when it embroiled the world in war, and nukes continued to threaten the world. consequently, it became much easier to allow everyone to criticize and be skeptical of capitalism, so long as they were also critical and skeptical of all existing socialist countries as well.

this later developed into what we have today, which is that you can say or do whatever you want, so long as you don't actually threaten capitalist society at all. and of course the background of the cold war is also important to understand here too. postmodernism is, in essence, the superstructure of capitalism in decline, as a force that recognizes itself as no longer progressive. this is why many postmodernists were avid anticommunists, while also using marxist words/terminology, in an effort to confuse a new generation of leftists after the red scare. if you read any derrida regarding marx, it reads as incomprehensible and laughable gibberish and only serves to mysticize and mystify.

can you provide an example of postmodernist tendencies that are coherent with marxism? my understanding is that they are diametrically opposed. the claim that not all postmodernists are the same is often used by postmodernists to distance themselves from other postmodernists who are openly unsavory. and, there will always be differences between sects of a branch of philosophy, but this doesn't mean they don't come from the same branch. it's just differentiating what the branch, or underlying similarity, is.

just want to clarify that it wasn't exactly mango press making that specific argument, but someone in telegram comments. and, the argument wasn't that his english was fluent, but that he used specific idioms that only an american would use. mango press did make the argument that only a US citizen would be eligible for student loans.

one of the claims in that mango press thread was that hakim lies about being an iraqi, or at least living in iraq, for online marxist clout. the argument goes that because he was eligible for US student loans for medical school, he's probably a US citizen. there were also some examples brought up about euphemisms he used that only a fluent or first-language english speaker would use. no idea how true this is and it's not a lot to go on, and mango press has some fucking weird opinions sometimes, but i can't deny that it's possible.

hakim having weird, uninformed, or no opinions on present-day events is not totally out of character: i watched a conversation on present-day china between him and paul morrin (anti-china maoist), and was surprised at how lukewarm at best his defense was. no mention of like the NEP, him calling china bad because "state capitalism," etc. anyone curious should watch it for themselves. let's be honest, there's no reason why we should all read theory and study historical trends other than better understanding the present, and consistently having not-great takes on the present makes me question what good his content can be except perhaps as an introduction for people who aren't marxists or leninists.

also noticed recently that he's put ads on his youtube videos. i'm sorry but this does affect the content, because at the very least it affects the purpose why the content was made. it also implies that the content is intitutionally-friendly enough for a company to buy advertising time from them. we should be extremely, extremely skeptical of theory youtubers and especially advertised content. if ben norton or BT news suddenly got sponsored by fuckin surfshark or expressvpn, i think we would all be very surprised. i haven't unsubscribed yet, but just the title of this most recent video gives me "capitalist brainwashing" vibes, which ultimately gives ground to multiple anticommunist tropes. will perhaps edit after i watch.