Nextdoor is such a disappointment for me. I've never been that invested in the giant social networks but Nextdoor often has legitimately useful posts from people in my area. But my God, the company behind it is so toxic they ruined what could have been a great product. It's like they have tried to turn it into a low rent Facebook and largely succeeded. I used it regularly for a time but have pretty much given up at this point and can't remember the last time I logged in.
The biggest problem IMO is the local moderators. They were too cheap to hire their own and instead recruited locals who were somehow unfit to run an HOA, then gave them censorship power.