Doom Lord: Only I Can Build a Safe Fortress

Good news: The doomsday is coming, I am bound to the infinite shelter system, and I can kill monsters and upgrade! Bad news: There seems to be a serious problem with this system! I just want to farm safely and grow up. The system forced me to become wild. Scene one: I hid in the basement and just wanted to be a turtle. System: [Issue a mandatory mission: rescue the school beauty, failure penalty: shrink the shelter by half! I had no choice but to rush out, but the school beauty I rescued was a tsundere young lady who knew nothing. She (confidently): "If you save me, you should be responsible to the end. I want a private room and a hot bath!" Me: "..." Scene two: I finally saved enough points to upgrade the defensive turret. System: [Congratulations to the host for improving its combat power! You have been automatically matched with opponents of the same level. In three hours, the elite BOSS 'Tyrant' will come to visit you. I looked at the words "Half effect against heavily armored units" on the turret manual, and my hands began to shake. Others: "Lord is mighty! We are saved!" Me (inner OS): "Save Hammer! I'm going to be destroyed by the group!" Scene three: I finally upgraded my shelter into a mobile fortress and prepared to move quietly. System: [It has been detected that the host has activated the mobile function for the first time, and has celebrated you with a one-hour top broadcast and light show on the city's survivor channel! I listened to the overwhelming tide of corpses outside and the alarms from various survivor forces, and silently turned off the lights. Everyone: "A miracle! This is a miracle!" I just want to say: "Stop worshiping me and run away! This system wants me to die!"