2) Stop making stuff up. Look at the bold part in what I said in the original post. How is that me saying it was an outlandish idea?
3) Tanya got injured left and right from the start, and that is with her training her combat magic diligently. This guy, without ever even sitting in a mech, suddenly piloted it beyond flawlessly and destroyed a monster that dozens of knights can't beat. See how different that is? He is unmatched at magic, athletic (albeit short), intelligent, and can insta-program a mech he's never touched before. That is clearly lazy, if not outright bad, writing. It is clear that the author doesn't even know the first thing about actual coding and what programmers actually do.
4) But he cared about the mechs that were destroyed in this "not his world" place. If he really didn't see that new world as "his world," then why would he get so angry over a bunch of robots getting crushed? I'm not actually complaining about his lack of concern for life. I'm complaining about his comparative concern for life vs. machines that can be rebuilt (and apparently made from scratch).
Good luck having this walking wish-fulfillment trope lose. I'm being sincere when I say that.