This story isn't so bad in terms of isekai. The main character (MC) Han Soo Kang failed being the hero since he need to be well like and a good person sadly he turns out to be rotten since he kills his allies in chapter one and has to redo.
The MC act in a realistic manner to anime tropes in the beginning that they are funny like the whole tsundere bit would of course make you hate someone In Real Life (IRL) since they angry easily. We the reader,enjoy it because we have reader's omniscient but IRL it would be extremely hard to deal with. The whole walking in bathroom and seen them naked and they beat the crap out of you trope would also make you hate people too. He also makes valid point about why he was isekaied and modern convenience like plumbing.
The MC is someone who is very intelligent since he is able to realize loopholes in the things that are holding him back and think of way to work around them but sadly as the story progress it suffers from power creep since he keeps facing stronger and stronger people and getting skills. He often kills his enemies in 1-2 chapters and moves on. His character also changes from being smart to just bland since he becomes so Over Powered(OP) that he is just winning without much thought or strategy.
The other character are just useless extras for our MC and make sense since we see it from his perspective to mach.
I do enjoy the moments when he says FU to those that are in charge.
