I originally saw this in a YouTube video, but I prefer reading over listening to a slow AI translation, and so I'm asking if anyone knows what the title is. I tried chatGPT and got nothing.

The main character is part of the hero's party, but is betrayed by them and turned to stone by a demon. He internally analyzes the magic and escapes the petrification 20 or so years later, having unlocked the knowledge to use much better magic than he originally could. He wants revenge on both the hero's party and the demon lord.

He ends up traveling with the daughter of the woman who he promised to return to and marry (though obviously she didn't wait forever and settled down with someone else—seems she waited 7 or so years, and one of the members of the now fragmented hero's party settled down in that village, so she was probably told he was dead).

Seems to be in a manhwa style. The main character's name was translated as Abel, but I don't know if that would actually help.

Edit: I saw the typo in the title.... Welp.

I'm a jack of all trades but master of none. Too many jars and not enough hands.

The comments from the youtube video said the series is dead, it doesn’t have ending. If you still want to read it, there are only Russian sites since they have purged it from english ones.

The title is:

I was sealed as a substitute for the hero, but I have a bad skill and became the strongest in the world.

Меня запечатали как замену герою, но у меня плохой навык, и я стал сильнейшим в мире.

Thank you so much! It was such a pain finding the title for this.

I'm a jack of all trades but master of none. Too many jars and not enough hands.