Doesn't that sound dangerous ...
So you're a cynic, Werther? Comes from reading too much Schopenhauer and Nietzsche. :)
But seriously - you seem to be in the same mood Goethe and his contemporaries were at the time he wrote the novel. Goethe - in spite of writing Werther - survived, while many fans of his book did not. They committed suicide just like their idol. Goethe himself was much too rational and realistic for that - and he loved life too much. Additionally he was by no means of the opinion that love was only for other people - he took what he could get, making quite a few women first happy and then unhappy. The good thing about that is that he gave us some of the most beautiful love poems.
I have read Tonio Kroger, but it seems such a long time ago that I hardly remember what it was about. My favourites by Thomas Mann are Buddenbrooks (best novel ever) and Magic Mountain.
By the way, why don't you try Goethe's Wilhelm Meister? In that work he gives his hero the chance to develop and mature without killing him before the poor fellow knows what life can hold in store for him.:D