Here's a "Solution"

Here’s an alternative to the standard “our protagonist is an OP reincarnated from the future” or “our protagonist is an OP reincarnated from a different world”:<br><br>The world that our hero is reincarnated into is identical in every way, but it is a copy cut from the first reincarnation in the grand multiverse. It is in every way, utterly and completely identical, but if there is an alternate reality perfectly identical to our own, then there must be one perfectly identical to it as well. <br><br>Therefore, the universe that our hero is reincarnated into is utterly and completely identical in every way except for a few subtle differences, mostly small details that a reincarnated person would be unlikely to notice at first glance. Perhaps a small change in personality, perhaps a change in a feature, perhaps a change in a person’s interests, hobbies, or demeanour. Even the tiniest of changes would exponentially multiply into larger ones until the world is completely different from the one our hero was reincarnated into. But in the beginning of the story, it starts off exactly identical, until our hero catches our attention and realises the very subtlest of differences in the world. <br><br>I know that there is this one anime that uses this idea, but I can’t remember its name.