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1: did I imply that right now or was it something I had said before?
2: I think because Digimon is a niche whereas almost everyone is into Pokemon. Digimon community is kind of still too small for there to be any fighting. There are certain series that are kind of looked down on more (02, Frontier, Xros Wars) but to be completely fair, I have never seen anyone give anyone else a hard time because they said they liked them.
As for Pokemon, it's something everyone grew up with as a kid and then dropped off. So for most people "the bad gens" = "the gens after I personally stopped playing" (even I was guilty of this when I stopped after gen 4 and thought Gen 5 was Pokemon jumping the shark, now I think it's great)
Even with people who still play every new gen of Pokemon though there are tense arguments about it. IDK, I guess it's just a community of toxicity that keeps perpetuating the toxicity. Digimon is more niche so toxicity can't really start in the community
As for gameplay I wouldn't be sure, one of the most toxic communities in terms of arguing about what is good and not is the Star Wars community (especially now that there is a 3rd dimension to the argument, Disney). my hypothesis is just that it's a niche community.