The chat filter is getting less strong, but it still seems a bit stronger than it should be. So this is going to be my explanation for how it got so bad.
So a long time ago sentinel was utter garbage, so garbage players had to report to actually get someone banned, players reported all the time, most people had obs ready to be hotkeyed, because this actually cleansed the server and was something everyone could do, then staff looked for this in helper applications, having reports made it more likely to become staff, this truly incentivized making reports, Hackers were in practically in every game, someone could make 10 reports a day. Then the anti cheat got better, Hackers became really rare. No one has any thing to report anymore but everyone is still used to writing reports, so people looked deeper and deeper for things to report, thus why party chats don't allow swearing.
So a long time ago sentinel was utter garbage, so garbage players had to report to actually get someone banned, players reported all the time, most people had obs ready to be hotkeyed, because this actually cleansed the server and was something everyone could do, then staff looked for this in helper applications, having reports made it more likely to become staff, this truly incentivized making reports, Hackers were in practically in every game, someone could make 10 reports a day. Then the anti cheat got better, Hackers became really rare. No one has any thing to report anymore but everyone is still used to writing reports, so people looked deeper and deeper for things to report, thus why party chats don't allow swearing.