It is against site policy to call out other users for bad behavior. You can block them and if the problem is bad enough, open a ticket to staff. Tou can also use the Report button on the player's profile.
https://support.chess.com/customer/portal/emails/new
I've used the snip tool to capture some rudeness and a few other reportable messages from various players. With the snip tool I have a picture of the players' name and their comments. I'm not sure how to use these now though. I can copy them and paste them into my own docs but not into posts here - so I can't put them on the offenders wall for example as a warning to others or use them in a report to moderators. How should I preserve behaviour and comments I intend to report as it is happening eg mid game? Does that make sense? Many thanks.