NunuXD
I can understand that you don't want Alex to become strong too quickly but there is a way to overcome it and that is that instead of using GP to improve his skills it would be better for him to train them on his own, also there are useful skills but not so op, like the kame kame ha, sense the ki, teleportation, the abilities of X character from assassin creed, such as stealth, assassination tactics, etc.
I rarely see any fanfic out there in Marvel that have MC actually developed mankind to be able elevate themselves from a weak race among the vast universe. Most fanfics usually revolves only the MC and others around. But the mundane folks are ignored and usually nothing but statistics when it comes to falling numbers. I like what this story is envisioning. Helping out mankind not just few but all of them so that they could go grow more than just weak-minded people in this dangerous reality they are living.
this story is grate and all but your a completely skipping MC and Anna's relationship development and many other characters development and focusing more on explaining about games and advancing them like all we have seen of MC interaction with Anna is the BBQ and Fortnite match and that was only like half chapter so like 3 out of like 115 chapters is all we've' sense of their interactions and it's disappointing and kinda boring after a while