“People didn’t reject TLJ because their emotional maturity wasn’t up to the task”
Some people obviously did though. The idea that NOBODY did that doesn’t make any sense. It’s an overstatement you’re making in response to an overstatement he’s making to arrive at one of his bigger points (which I find lucid and relevant). It’s not total nonsense to suggest people didn’t understand the Last Jedi, especially not in the face of two years of people very loudly not understanding it in front of as many people as possible.
There’s no point in attempting to reject observable reality simply because it doesn’t align with your personal viewpoint. You’re not the people he’s talking about, and that’s fine. You don’t need to then try and further argue that the people he’s talking about don’t, and have never, existed. They did, and they still do. You aren’t among their number, and don’t need to count yourself among them for your opinions to have validity.
I don’t take your arguments against the review as an attack at all, but I do think trying to erase the group of people he’s talking about doesn’t help anything.
Further - I don’t think there’s anything really sanctimonious about the tone of the review at all because he’s also describing how he understands, and sometimes indulges, in the headspace he’s also criticizing. He’s saying that he’s been there, and he still visits semi-frequently, but it’s because he knows of what he speaks that he’s able (and willing) to make the criticisms he’s making.