I love characters like Kazuo, they get scared like normal people (perhaps even more) but they always manage to grasp that tiny bit of bravery they have in themselves when they need to. Can't help admiring characters like those.
@Saronite
The MC stays unlikable for a few arcs in the webnovel (a couple hundred chapters or so), and slowly improves his personality over time until he becomes a likable character. But yes, it's painful to see how shitty he is in his early days.