The 1st girl case, in my opinion, the problem in the MC. Well if you put someone in her shoes, I think most people will react like her.
Overall, 50-70 chapter still readable. After that? Become really boring.
To many forced logic and author make some action seems really easy (ex: early part when mc tried to get supplies).
interaction between character that bring into the plot seem logically error, the bridge between them no smoth and seems forced too.
the last, fighting scane and the reason behind them is really bad.
The premise of this story is to show mc power is absolute. Well, you can say the author successfuly deliver this premise. But, the scheme of others character seem bland and meaningless because you already know how the enemy/fight will end.
At the later part.... It regressed so much and become boring. So many unnecessary information and you can skip it without loss much important information.
Also, the power scaling and power systems is all over the place. If lvl 20 (if the MTL not wrong) is peak humanity before become immortal, but at lvl 5-8 you already running around the world within day. Than what come after that? (This is only one example)
The pacing is really slow, for me, it's unsuitable for apocalypse + regressing theme. It's like your average japanese Isekai slice of life but the worst version.