I’d even argue that being able to pinpoint several awkward in-betweens in an anime doesn’t by any means make it qualify as “bad animation”. the entire idea of even looking at in-betweens is stupid. animation is fundamentally about assembling different frames to create the illusion of motion. as a viewer your assessment is only valid if you’re considering exclusively what’s presented to you, that is each sequence as a whole. for instance we can all agree that it would be ridiculous to criticize a movie based on scenes that didn’t make it to the final cut. tbh it should really only be a problem if the big picture appears unintentionally unnatural.