Your first point is incorrect. Not all of the negative feedback is from people who spam comments and/or do hateful things. Checking the comment history disproves that easily. I can even prove that wrong by giving myself as an example. An example of what you just did was to try to put one label into one box. That's not how the world works. It would be like saying everyone hates pineapple on pizza, or all criminals are guilty. Of course, that's not true, and the same goes for that statement. That's basic common sense.
You cant just pull some fictional number like '90% of' as if that's true. It might sound good to you for the point you are trying to make, but I could simply say 90% of the people in the comment section are people that post positive feedback, and drown out real feedback. Of course, that's a complete lie, but that's what you just did. Which would get us nowhere.
As for your other point, which goes on to assume I defend such people. I have actually done the opposite recently and in the past, which is easily checked. You are the first person not giving negative feedback that I have disagreed with. Never assume things. Actually check that you are correct first.
I will repeat my original issue I have with what you said.
Negative criticism does not = cause of the games delays and/or issues.
To say otherwise is a lie, and promotes an echo chamber that makes people that want to give genuine critical feedback scared to do so by fear of the exact same thing you are against but in the opposite direction. Your solution would only lead to the same problem.
I stand by my statement that what you are doing can be just as harmful, because there are examples of this very thing that have happened on this website of game developers that promote your very ideal. The result has caused great harm to the games' development, far worse harm than if they engaged with the negative feedback that they were given.
We have the cult-like fanbase of Lessons in Love as a prime example; the author is yandere simulator levels of arrogant. The game insults fans who don't blindly swallow whatever he's throwing out, and the author outright takes an arrogant stance of "you don't get true art" if you so much as question his game. If you don't know who 'yandere simulator' is give them a search for another example of this. Fortunately this dev is nothing like those people, and has been very open with criticism.