Why isn't my resume passing ATS?
Usually it is not your experience. It is your file. An applicant tracking system does not look at a resume the way you do: it flattens the whole document into one stream of text, reads that stream in whatever order the file emits it, and hands the result to a keyword matcher. Your layout is gone before anyone scores you.
That is harmless for a plain single-column resume. It goes wrong when the template gets clever. A two-column layout only survives if the file writes the left column out in full before it starts the right one. Plenty of templates instead write line by line across both, so the parser reads straight across the gutter and your job title lands next to the other column's dates. Tables split labels from their values the same way. A resume exported as an image parses to nothing at all.
None of that is visible on the page, which is why silence after forty applications is so hard to debug. Readout shows you the stream itself, then marks the places on your own layout where it broke.