Cobalt44

I'm not sure if it's a bug or not, but I've just failed 2x Tier 1 quests. The first one on Day 1. I had to clear a house but it had a radiated feral zombie in it which destroyed me. The second one was also a Tier 1 quest, this time on Day 2. The building had a tough old man outside it - 900 hp, sprinting, and quickly regenerating health. Am I supposed to be finding zombies this difficult on days one and two on Tier 1 quests?