The standard for a Mary Sue character has gone way up too. The Japanese really figured out the formula with isikais where the protagonist is almost always good at everything or OP in some way, but the writing/world building is better. There are enough gems amongst the garbage that people know what a good one should contain now.
Your unwillingness to read the link you post while asserting children are illiterate, is both tragic and funny.
And that you then act like everyone else is silly for countering you? Go find a bridge, troll.