Interesting. I was on RPG hiatus during the 3e/4e late unpleasantness. It was always whispered to be a time of great turmoil, though.
I was quite involved with Paizo fora etc. when PF2 emerged. There were certainly some very bitter, melodramatic people who saw the new game as an affront to all things decent. However, the vast majority of those disinterested in the new game, I feel, were similar to myself, and have just largely ignored the new game and continued on with their huge troves of extant 1e material.
I have stopped paying attention to Paizo at this point and I feel many others who prefer 1e may be the same. There is no need to go to the 1e reddit or Paizo fora as Paizo have stated many times they will no longer produce material for that game. I am not bitter about that at all. I have plenty of material already. However, I think that could be one significant reason PF2 Reddit has more users than PF1.