Because you seem personally aggrieved by what you have seen, and therefore are probably unable to discuss these matters with anyone who disagrees. Discussions like these can only happen if the personal stakes, including emotional ones, are low.
If that seems unfair, so it is.
For what its worth, the definition of success in Kosovo depends on who one is. If its the US and most of Europe, then its a success. If its the majority of the Kosovo population, also. The minority of the Kosovo population I am certain has been and is still sometimes being tragically mistreated. Thats not right, but there is always some tragedy in any situation like this, and it seems that it became inevitable once people started hating each other so intensely.
The problem with the anti-Albanian point of view as so often expressed here is that this idea requires that the majority suffer for the sake of the minority. As we all saw in 1999, thats even worse than what is happening and what probably will continue to happen there.
Thats certainly not going to satisfy you, and in all probability will also make you even more angry (which is why my answer is pointless), but you have your answer.
The destruction of 200 Christian churches and monasteries are only a success for the anti-Christ and his minions.