Once every media company became a streaming company and started using anticompetitive licensing practices in an attempt to drive viewership to their own platforms, the market fractured too much for it to be profitable.
Something smells “prisoner’s dilemma” about it: the best move for any individual streaming service is to have exclusive content (and the best-positioned players to do that are the studios), but when everyone does that, it decreases the overall profit available in the market more than it increases their slice of the pie.