I do apologize if I misunderstood your post, @ivanos , maybe because English is not my first language.
I’ve faced this situation well before the Known Issue post was released (I am one of the Local Guides who asked to have an official post), and then I had hidden reviews again, as I explained already in my first reply, so I perfectly understand the frustration. And I have hidden photos too.
However, I don’t believe in Google “hiding some [of yours] reviews with no reasonable reasons” nor “conducts some kind of censorship as what the Chinese communist has been doing” just to mention some of the sentences of your post and comments, nor in “serious contribution being ignored”.
I believe the “reasonable reason” can be wrong, and I believe an AI is not perfect, that’s why, when a review of mine is hidden a simple fill the form, for a human to check and to “teach the AI”, helping in this way the filter to improve.
I’ve read literally hundreds of posts about hidden reviews in the last year, trying to help the Local Guides to understand why some reviews are hidden and how to edit/ improve some of them.
And I’ve reported hundreds reviews in Google Maps, because inappropriate (offensive, stolen contents, duplicate reviews, promotional reviews, spam) so I am perfectly aware of the issue, in both sides. And I’ve responded to businesses who asked here for reviews to be removed.
Again, I don’t see a proposal nor an open discussion in your post. What is your practical proposal/suggestion for improving the system? As the title of the post is “intolerable”, what can be “tollerable” for you, generally speaking?