@NizzBizz
Like fight someone for once seriously because at this point
Are we reading the same manga? Did the fights where he died not happen?
Don't you remember when he first started exploring and he saw the golem?
The golem was a monster he couldn't do shit to and Lumi, BY HERSELF, destroyed that giant thing.
Youta said at that point, that he underestimated the power dynamics of this world, and wouldn't underestimate it again.
Lumi's not even that strong in comparison to some of the other fighters he met since then.
Dude's been using his wits since the beginning, and only relying on his strength in the special circumstances where he can. These girls are all supernatural entities that can chop moving stone enemies the size of buildings with swords.