haihai, currently the only way to get the bad ending is to reject staying in the server! since it's only the demo, the only way to avoid the bad ending is to continue being in the server and chatting to these *killer* love interests!
Idk if you already figured it out, but basically how I got onto an individual route was rejecting to video call with everyone except one person and then made sure to only choose that person's options. I was confused too so even if it doesn't help you hopefully it'll help someone else lol.
