The Yugoslav wars were mostly ethnic conflicts that happened after the collapse of communism, not exactly a democratic revolution.
I concede in Romania, but that is an atypical case. The overall case of collapse communism was peacefull: Poland, Hungary, East Germany, Czechozlovakia, Bulgaria, Albania, ...
No, the way to 1989 wasn't all that peaceful. For example there was the martial law and repressions against "Solidarity" during 198x in Poland. And you forgot the 1968. The resolve of the East Europeans in 1989 was pretty clear that if USSR brings in tanks the people will continue to stand up even in the face of the tanks, and it will be 1968 all over the place. The 1968 provided credibility to that. Thus the USSR and the regimes supported by it backed finally down.
We're falling into splitting straws on semantics here.
All repressive regimes repress, that's what makes them authoritarian. But a violent and successful reaction by the opposing/democratic forces implying a large number of deaths is actually quite rare. This is my point.
https://en.wikipedia.org/wiki/Yugoslav_Wars 130000 dead
https://en.wikipedia.org/wiki/Romanian_Revolution 1000 dead