How I Became an SSS Rank Delivery Hunter

I don’t think I feel with this. I’m under the impression that the mc doesn’t consider the different worlds that he delivers to as reality. An example is when he came back and saved the dirty blonde girly that tried to frame him that almost got him killed. The girl didn’t apologize to him or at least explain the reasons behind her actions. He just acted like there was no problem at all. I know he got the gist of it while watching and listening to bits and pieces but it almost costed him his life.
.
Maybe I was hoping for a little bit of zero to hero so there could be character development. It’s hard to like an mc when he already acts like the cool level 1000 regressor after just receiving some strong items. Idk why I’m nitpicking this so much but I could guess that I’m just disappointed because I already have high expectations. This might not just be for me though.