I totally understand. But virtual games should not irritate people like that - its clearly a sign of issue, although not a matter of debate here. And I understand your point.
If you are looking someone who would like to get rid of bad experience matches or bad players, then we are all with you. But there are no rules against them, nothing prevents them being excluded from the game. They have all the right to talk, not talk, attack you, troll you, block you etc. Blacklists wont help, because probably less than 10% reads the forum. When I joined warlight and played open-room games around 200 of them I already had 400+ players blacklisted. Believe me, it is endless job. Only option to play the game is to find decent folks among games you play and make a list of them, start talking and play with them. And only use random open room games to find people - taking them seriously will give you the same crap experience. I understand the point of getting matched up with random players and looking how it goes - but Warlight just can´t handle this. I would advice to increase prerequisites a little.
Try now to understand the game Developers. It is not in their benefit to get rid of those players: they are potential feature-buyers, add-viewers and source if income. Don´t be offended but quite often it is hard to make strategic or adequate game with people under certain age group, but usually it is not economically beneficial.
Third point, we as other players, spectators of your game, have no information what triggered his emotions. Blind trolling or maybe you pushed him in team-chat or PM. Directed his orders, commanded his armies and it just drove him off. There are many possible reasons. And if you wish to find the worst of players, visit off-topic, they always welcome another troll, so don´t feed these names here. No-one benefits from that.