For the reason of shit talking is fun in games and if two people are as bad as each other I feel like you should let em do it, no bias towards either person in this situation I just think shit talking is fun and if no one else is getting negative impact from it whats the issue unless someone asks the other to stop and they find other ways to insult them which would then class as harassment but from evidence shown here it started on ssrp then went to discord and both players continued, either way best of luck