...Civ III and IV was well into the internet era, Leucarum.
Gori ; it's quite likely true that you, specifically, haven't engaged in the behavior I describe. Certainly your posts here have been measured and respectful. I'm not attempting to accuse you of doing wrong, I'm arguing with you as to the overall nature of the backlash, and its intensity, as a whole. That doesn't mean what I say describe everyone who is unhappy with the design decisions, and every reaction to it. No one can do that.
Even in the past, there would certainly have been posts saying "I don't like these aspects of the new game". And people deciding, after reflection, not to buy the new game because it didn't feel "for them". And other people posting their criticism but deciding that, overall, the game was still for them. That's normal levels of response. Saying something isn't for you is fine. Not buying it is more than fine. I expressed my disappointment with some aspects of Civ III in the past. I skipped Civ V at the time. I haven't bought the latest Pokémon game (and barely played the previous one).
But I didn't make a show about it. I just went and played other games, while waiting for my issues to be fixed (or the game to go on sale at a price point that fit my appreciation of it). Lots of games out there. It's not that hard finding one you'll like, if the new version of your favorite series isn't your cup of tea.
But the "This product in MY SERIES is not being made to my specifications which is a personal attack that deserves lashing out at the creator to hurt their product sales beyond just me not buying it, and to make them feel bad about daring to not give me what I want" level of backlash? That used to be the work of a slim minority within each fandom, easily ignored. But over the 2000s, 2010s, it grew into something extremely normalized, that a lot of people assume is the right way of reacting to not getting what you want.
And it's scary. Far beyond its impact on Civ, because it doesn't stop there.