The community health is linked to the quality of the content and the length of time its been out and unfortunately the final patches for Endwalker have been some of the roughest ones in the games 10 year history. The expansion had good ideas going into it but the balance of content has been very swingy, with things either being too easy or too difficult due to the design direction, the introduction of cross DC travel breaking up established communities rather than helping build them as well as rendering access to some of the side content difficult due to limitations from cross DC travel, and underwhelming content drops that were relatively low effort such as the manderville relics.
The reality is that they probably needed to have set up safety nets for the difficulty issues, like having an echo meter that could be turned on to assist groups doing savage or a way to scale up the damage of enemies in other content deemed too easy for additional reward. What they likely did here was try to simplify the game as much as possible to reduce the workload and then reduced the content they were going to release to make space to do the graphics update. This nuked the living crap out of the replayability aspects of FFXIV as even the Heavensward relic being done unsynced is more challenging and interesting to do than the manderville relics. Let alone the fact that cross DC travel nuked island sanctuary access and just about every other system they have. Of course people are going to start getting grumbly and ticked off at one another when the existing content in the game is the way it is and the answers being given via fan fest are largely dancing around the problems or trying to shift the blame to the community itself.
At the end of the day, the community is simply a source of feedback on the design decisions taken by the team who built the game. Players are not the ones who designed savage, nor does our feedback design or create content: The developers have a vision they implement and then adjust it based on feedback.
And as far as feedback issues: Likely people didn't give much feedback during the back-half of shadowbringers because the game was in a good place. People liked the savage at the time even if it had flaws, but there wasn't much constructive criticism other than Bozja needing to have ways for players to do it as people naturally moved on or finished all their goals for the zone. I personally don't recall anyone asking for tighter body checks on fights (normal content or otherwise), only that people stated that savage was easy compared to ultimate and "anyone can do savage", which honestly isn't a bad thing. Having difficult content that anyone can do with some effort is much better then what exists in the current game.
In any case, patch 6.55 is coming mid-January so I'm praying they are going to at least ATTEMPT to address concerns with the content. It doesn't even have to be much, just they got to stop ignoring people. This is a situation where people legitimately may never come back to the game once they leave.