Three out of four legs of my trip were delayed. The last leg of my trip was delayed due to passengers and crew not being ready to take off. The boarding process started way late with no explanation as to why. The flight attendants did not have the passengers in check for takeoff - folks were walking around, trying to change seats, and causing a general disturbance preventing us from departing and the crew did nothing about it. All of this caused us to miss my connection home due to the first flight landing at the same time the second one was due to take off. The entire Spirit crew (except for one flight attendant) was unapologetic and unpleasant about this. No one apologized, no one showed any inkling of empathy whatsoever. The response was basically, "we booked you on the next available flight". That next flight was a full 24 hours later, we would have been stranded in the airport and no one even cared or acknowledged us as customers. I'm disappointed in the lack of compassion shown by Spirit agents and customer service reps as a whole. It felt like we were a burden due to airline scheduling issues. The one flight attendant (did not catch her name, but from (ORD to FLL) was wonderful and empathetic.