You have a strange definition of a normal person. Also you do know people can get paralyzed by fear and terror, right?
Fight or Flight is a basic human instincts that take over once a significant threat has been established. That aside for the moment, the human brain is constantly looking for ways to avoid death even as you're dying, that's what the "Life flashing before your eyes" is. It's your brain in panic mode looking for a solution from past experiences.
Dying 2 times would be enough for any normal human to recognize they are in a bad situation, 3 at most, and they'd start to run out of sheer instinct. Fear paralysis also isn't an excuse because we see he's thinking clearly as he's dying several times over so we can assume the same would be said for a normal person too, meaning a normal person would have a functional awareness that said paralysis wouldn't exist under because it's had time to process and recognize the threat. At this point your brain would kick into over drive figuring out a way to handle it starting from it's most basic solutions, running.
Humans learned to survive through the harshest environments and hunt the toughest animals on the planet since caveman days. Your body knows how to handle fear better than you think it does and I would assume in a world full of magical monsters, these instincts would be heightened to new levels.
Also most of the comments were discussing the skill choice which apparently doesn't even matter
This is untrue. Out of the six pages at the time of writing this comment, counting only non-reply posts, there are are at least 34 comments mocking the overall manga or the MC, 3-4 actively mentioning changing his skills and 4-5 being confused about what's happening with the pace of events. Others are just relating it to some point in their history, arguing something similar to us or continuing a joke. There will probably be more to skew those numbers in the future but who knows, regardless I was referring to comments like this
He had enough time to consider the situation that a bugbear hit him and killed him, and then turn around. Most would panic and try to gtfo out of there instead of repeating this several times.
The people questioning why he isn't reacting and responding like a normal human should are doing so simply because of how the manga is skipping content that apparently shows him figuring out his situation, how much time he has, the pathways around him and the proper strategies from dying over 100 times and is improperly formatting the information it's choosing to give.
Kingdo himself points out as a novel reader that a lot of the critiques of the manga so far are explained by the Novel but the manga is skipping it. So the problem is that he IS acting like a normal human, but the adaptation isn't doing the novel justice and making it worse than it appears for people paying closer attention to it.