I completely agree that things have gotten a lot meaner in recent years, perhaps reflecting real life divisiveness. I’ve never encountered nothing anywhere near that toxic; I hope you’re ok
What i see is more trolls. More people who just want to argue or insult. More people who may have a point but jump right to denigrating the entire person or political affiliation or culture or country. That was one of the reasons I left Reddit but it’s here too.
But it’s also the commercial services, treating their customers worse and worse. More ads or more data collection or less service or uglier about scenarios that don’t fit their ideal