At what points did you feel that Billboard music charts (https://www.ask.com/culture/billboard-charts-music-industry) were extremely inaccurate (https://www.forbes.com/sites/bobbyowsinski/2021/01/17/are-music-charts-a-relic-of-the-past/) in reading (https://tvtropes.org/pmwiki/pmwiki.php/Main/ChartDisplacement) of what songs were the most popular (https://www.theringer.com/2016/7/26/16047050/billboard-hot-100-singles-chart-broken-313cbe9094b9) at a given time (https://pulsemusic.proboards.com/thread/198425/chart-inaccuracies-mistakes)?