Keep in mind, I was talking Star Wars as a franchise, not necessarily the films and how it relates to Disney's bumbling. Though that being said, none of the films together have managed to climb out of the 4 billion dollar cost of purchasing the franchise as these movies cost to make these films was about a billion dollars in total. This could be off-set by merchandise, but there have been rumblings for a while now that the new toys don't sell and now the new Star Wars theme park is being declared a flop.
Disney Star Wars isn't like Marvel or Pixar, which are companies that were already successfully producing films before their acquisition and maintain much of their own autonomy, Lucasfilm was a skeleton of its former self by the time of the acquisition and had to be rebuilt by Disney. So its success and and eventual failings are much more reflective of the company than Marvel's success.
TLDR; Disney doesn't have a perfect record with its acquisitions and we shouldn't pretend that Disney's purchase of fox is them playing fourth dimensional chess and we just can't see their true plan.