You and your fellow students experienced something extremely traumatic. Perhaps go to therapy first to process how you are feeling before making any significant life choices.
Yikes, that's a rough outlook. Not disagreeing with it, just poking at it a bit from a distance, and hoping that you experience a change in direction after a couple days.
I'd just like to say that I feel you and understand you. I'm a university student as well, feeling a similar way. I'm in Electrical Engineering, and I feel disillusioned with the way society is degenerating. Best of luck, friend. There still are good people out there. We may not be able to cure or fix society or even stop it from degenerating, but you can always build a life with loved ones and create your own world <3