I also saw none of the hate everyone keeps talking about being rampent over there.
Honestly, your mileage may vary. I know I've mentioned the "hate" mob or simply toxicity of the community in RR before but if I have to expand on that, it's practically PC and Diversity vs genuine creativity and story-telling and even just new writers.
Simply put if you write a smut or wish-fulfillment story that isn't with comedic undertone or seems too degenerate according to tastes then you will be assaulted with a bombardment of .5s and several advanced reviews that at times are filled with more spite than actual reviewing of the work.
Another point that extends more so to authors is that many of them will write an amazing story but when they arrive at a certain threshold of audience numbers they start virtue-signaling sometimes subtly sometimes outright making the mc a mouthpiece. And somehow they make it a point to tell the audience to blow themselves if they disagree.
Now onto other points, there's this weird movement with a bunch of people on RR who say that it is better to not include the tag or even mention LGBT+ stuff in the summary or synopsis because it should be "normalized." Now personally I don't give a shit if you want write that story, it's fine. But if you then complain that you are getting hate and receive messages like "you wasted my time" from readers or that they are bigots or homophobes in an effort to shame them, you're a hypocrite.
On the opposite end you can't criticize PC culture in stories, for example there's this story on RR called 'Monroe' it starts off with a white male protagonist working at a toxic office job where everybody is prejudiced towards him. That isn't the focus of the story but it is a little jab at the ridiculousness that some people might actually experience hell it doesn't it even continue past the first the chapter, but so many people went out of their way to report the story and knock stars out of their reviews for it.
Now going back to the wish-fulfillment aspect. For some reason there's an outspoken group of people who will say they hate litrpg especially "male-power-fantasies". I am not particularly well versed in this specific area of where it originates or what it really means. However, if I were to take a guess it's the fact that the readers and people who say this are tired of the 'chosen one' trope because in a lot of instances the very nature of a litrpg's protagonist is that they were specifically chosen and are hence much stronger or more capable than the average person. On the other hand it can be said that the market of litrpg or isekai fantasy is saturated with gimmicks, poor writing, and cliches.
In conclusion if you don't fit into any of these targets you are probably golden and have nothing to worry about and in a lot of ways you are definitely in good hands when it comes to writing tips and advice that comes from their forums. I will also add the caveat, it most definitely is not a 'beginner or novice hobbyist' site. If you aren't looking to improve expect hate, if you aren't that good at the beginning but choose to move forward expect indifference and apathy towards your work. It's the same on all sites though, you have to market your work for more exposure at the beginning, your first reviews will most likely be from people you have pm'd and you are the only one who cares about your series at its inception.