No, dummy, bad guys winning is not bad in and of itself. The problem is that nothing matters in either of these movies. The good guys won in The Force Awakens, but the bad guys are not affected in anyway. That makes the bad guys winning in The Last Jedi irrelevant, because even if the good guys won, it wouldn't matter. Why is The First Order in charge? What's the appeal? Why is The Resistance a resistance? Why aren't the peoples of the universe uniting to stop The First Order? How does the destruction of Starkiller Base have NO effect on the plot?
If it doesn't matter who wins or loses because one side always wins for the sake of drama, why should the audience care?