Sh*t talking when winning

What's the point of typing a comment that's only supposed to piss off your opponent when you're obviously winning and there's been no prior chat or any laming. He could see from my nick that we're both Finnish and wrote in Finnish. I didn't respond. It wasn't anything terrible but it was kinda rude. I tried to come back but ended up losing and typing gg and nothing else. At least I was the bigger man.