TBH, most fiction have 0 plot holes. Most people who use the term 'plot hole' in commentary on the internet are using it incorrectly. They tend to use it to mean "something happens which I personally dislike or don't understand" rather than it's real meaning, "something that directly contradicts previous plot points and leads to a logical inconsistency." That is, it's only a plot hole if it literally cannot happen because it would negate some other plot element.
A character making a decision that feels out of character isn't a plot hole. Someone not choosing to use the sci-fi magic tech to solve a problem when it exists in-universe isn't a plot hole. It might be bad writing. But it's not a logical inconsistency.
A plot hole would be something like a plot point centering around a character's illiteracy (in a manner where it's clear they're not faking) after a scene where the character is shown reading.