Great Lakes used to be dubbed as "Great Mistakes" by many who flew there. They were beyond terrible. And in the late 90's when major airlines were hiring like gangbusters, they operated a scheme where every captain upgrade trainee would fail the first checkride before they are eventually passed. This was by design to taint the trainee's record and created a roadblock when it came time for them to apply to the major airlines. This was how they retained pilots.
Glad I never worked there.