@Velsy He did have something to use as a weapon. There may or may not have been better options lying around where he was hiding out, but he was obviously planning to use it if it came down to it. The other two kind of showed up before it came down to it though, and the story hasn't gotten to a point where he can have is moment of truth again yet.
You're also acting as if you'd really do everything you know you need to in a situation you've never experienced before just because you know you need to do it while you're currently safe and thinking about the hypothetical. Everyone who says they'd do this and that in the zombie apocalypse situation is honestly kind of full of shit, because you can't know how you'd react to all of that until you're actually experiencing it.
Now, If a lot of us wanna say we'd prefer a more badass male lead since this is fiction anyway, that's another thing and I can get behind it. I'm not necessarily looking to read a zombie apocalypse story to see people acting sort of realistically like the random civilians raised in peace times that they are. These girls that are essentially crazy for having adapted as quickly as they have and for coming up with the current plan they have for going forward are honestly more interesting to watch so far than the male lead, but let's give him a little time of actually being on screen to adapt before we write him off. Five days or whatever it was of "before the story even started" stuff isn't really the point. How things go in the next handful of chapters should be more important.