This is sad, although not entirely surprising. Thankfully the 4th season and its final episode did wrap up the story to a degree (and in my opinion got its footing back after a lackluster 3rd season) that one can walk away from it with a certain degree of satisfaction. The story wasn't over, but it was an ending we can live with, still leaving the door open to something further (see: The Expanse)
The questions of consciousness and free will that were explored in the first two seasons are ones that will stay with me forever. To this day I cannot listen to Dr. Ford from the soundtrack and not get a little misty eyed, contemplating everything he was attempting to accomplish and how it all went so horribly, horribly wrong.