If sales are not the most direct indicator of whether people like something or not, what is?
Apple has released many MacBooks with essentially the same keyboard design since 2015. If people really hated them, sales should have tanked in subsequent years, and Apple would have something different by now, 4 years later. The people who keep posting that they'll switch to PCs, would all have switched by now.
Do you suppose the number of people complaining here represent a significant percentage of the millions who have purchased MacBooks with the butterfly keyboards?
People who are satisfied with them aren't going to flock to every post to balance out the complaints. Those who do post in favor of the new MBPs get downvoted into grayness. There may be issues, but the incessant negativity feels bizarrely overblown and seems memetic at this point, if not outright paid for by rival companies.