I'll never understand the trope where the MC has all these rare abilities, but thinks they're useless. It's one thing if he was a child, brand new or never, ever spoke to anyone except his manipulative party, but the first chapter shows he's been an adventurer for years and clearly knows and speaks with people outside his party.
So I guess we're getting the stereotypical sad sack, milquetoast that will someday, after a long road of attractive women telling him he's awesome, find his spine and get a happy ending. Oh, and naturally his old party will disintegrate and want him back.