I have been on reddit for just about 12 years now. Something I’ve noticed over time is just how hateful the place has become. A complete outrage machine. Every single sub became filled with it. I’ve filtered so many subreddits over the last few years, it’s insane. I don’t know enough about this place to be sure, but I do hope it doesn’t become the same type of echo chamber of anger.
If you want to go way back, take a look at old BBSes or Usenet. The flame was commonly deployed. For many decades now people have used the internet to look at pictures of cats and also to talk trash or otherwise say horrible things. I don’t think Reddit is different in any major way, except that on subs that were decently managed, many of the worst commenters were banned and the worst comments were often down voted into oblivion. It really did depend on the subreddit.
The fact that some people behave like assholes is not in itself anything indicative about a website working well or poorly. In real life some people behave like assholes some of the time too. Of course we have and should continue to take reasonable steps to deal with much of the badness, but we should never expect or aim for perfection on this front.