Also, all of them shouting at once. At a very basic biological level, if you actually want someone to hear you and "comply," you should endeavor to make it as easy as possible. Which means, one person for them to focus on, speaking at a reasonable speed, and, ideally (when safe) engaging in a dialog to confirm they understand you, etc. We've seen horrific examples of multiple cops shouting contradictory information that has led to deaths. It should be 101 before they bust in the door to align on exactly who is doing what vis-a-vis the suspect, including and especially giving direction to them.

ETA: I wonder what the training actually is for this scenario. I continue to be shocked that there isn't one person designated to address the suspect. If I go into a meeting with my team, I know exactly who is sharing their screen, who is clicking, who is narrating, who is answering what questions, etc. and we aren't carrying cannons. It would take like :05 as part of the prep.