Messages

Reporting all the players in Dominion online who are disconnecting to avoid losing, deliberately slow-playing and/or are hilariously offensive in the chat (mostly all of that behaviour together), would be a full time job ;-)
I just quit those games and ban the player. Would be a waste of time and energy to report all the idiots in this community.

No comment ;-)

From time to time there are opponents who are just bad losers, insulting you or calling you a lucker even if you are clearly just playing the better deck at this moment. Most of the time I just laugh about this childish attitude. If one of them exaggerates this behaviour, I just tell it and the player gets on my banned list.

But playing a few games every day, I wouldn't say it's a real problem here. Most of the players are polite, helpful or don't use the chat at all. The trolls and/or bad losers are far outnumbered by normal users in my experience.

You mentioned slow playing: I think it's hard to set the limit here. In a game like Dominion it's necessary to think about your next step a few seconds from time to time. Thats especially true for beginners. I had annoying opponents who, especially when they fell back, tried to put me under pressure by writing "play faster!" when I thought just a few seconds what to play/buy next. These folks go on my blacklist immediately.